VMware Horizon 8 Console Configuration

Last Modified: Jan 24, 2024 @ 2:13 pm


This post applies to all VMware Horizon versions 2006 (aka 8.0) and newer.

💡 = Recently Updated

Change Log

  • 2023 July 8 – Global SettingsHorizon Agent Restrictions in Horizon 2306 (8.10) and newer
  • 2021 Sep 30 – Horizon Console – added step to disable CORS for Horizon 2106 and newer to fix HTML Access
  • 2021 Jan 8 – updated entire article for Horizon 2012 (8.1)
  • 2020 Aug 14 – updated entire article for Horizon 2006 (aka Horizon 8)


Horizon Service Account

  1. Create an account in Active Directory that VMware Horizon will use to login to vCenter. This account can also be used by Instant Clones to create computer accounts in Active Directory.
  2. Make sure the password does not expire.
  3. Domain User is sufficient. Permissions will be delegated where needed.

vCenter Role for Horizon

This role has all permissions needed for both full clones and instant clones. See Privileges Required for the vCenter Server User With Instant Clones at VMware Docs.

See the Product Interoperability Matrix for supported vCenter versions.

Create vSphere Role:

  1. In vSphere Web Client, click the hamburger menu icon and then click Administration.
  2. In the Roles node, click NEW to add a Role.
  3. Give the new role a name.
  4. If you are using vTPM, then on the left, click Cryptographic operations. On the right, enable Clone, Decrypt, Direct Access, Encrypt, and Manage KMS. Scroll down on the right to see more Cryptographic operations permissions.

    1. While still in Cryptographic operations, scroll down and enable Migrate and Register host.
  5. On the left, click Datastore. On the right, enable Allocate space, and Browse datastore.
  6. On the left, click Folder. On the right, enable Create folder, and Delete folder.
  7. On the left, click Global. On the right, enable Act as vCenter Server, Disable Methods, and Enable Methods, and then scroll down on the right to see more Global permissions.

    1. While still in Global, enable Manage custom attributes, and Set custom attribute.
  8. On the left, click Host. On the right, in the Configuration section, enable Advanced Settings. Then scroll down on the right to see more Host settings.

    1. While still in Host, scroll down to the Inventory section and click Modify cluster.
  9. On the left, click Network. On the right, enable Assign network.
  10. For Virtual SAN, enable Profile-driven storage and everything under it.
  11. On the left, click Resource. On the right, enable Assign virtual machine to resource pool, and Migrate powered on virtual machine.
  12. On the left, click Virtual Machine. On the right, click Change Configuration to enable all Configuration permissions. Scroll down on the right to see more Virtual machine permissions.

    1. While still in Virtual Machine, scroll down and select everything under Edit Inventory.
    2. While still in Virtual Machine, scroll down to the Interaction section, enable Connect devices, and then click See more privileges.
    3. While still in Virtual Machine, scroll down and enable Perform wipe or shrink operations,  Power off, Power on, Reset, and Suspend.
    4. While still in Virtual Machine, scroll down to the Provisioning section and enable Allow disk access, Clone template, and Clone virtual machine. Then click See more privileges.
    5. While still in Virtual Machine, scroll down and enable Customize guest, Deploy template, and Read customization specifications.
    6. While still in Virtual Machine, scroll down and click Snapshot Management to enable all Snapshot permissions.
  13. Click Create.

Assign role to service account:

  1. Create an account in Active Directory that Horizon will use to login to vCenter.
  2. In vSphere Web Client, in Hosts and Clusters view, browse to the vCenter object. Permissions must be assigned at the vCenter level. It won’t work at any lower level.
  3. On the right, select the tab named Permissions.
  4. Click the plus icon to add a permission.
  5. In the Add Permission dialog box, do the following:
    1. Change the User domain.
    2. Search for the service account.
    3. Change the Role to the one you created in the previous section.
    4. Check the box next to Propagate to children.
  6. Click OK.
  7. The service account is now listed on the Permissions tab.

Active Directory Delegation for Instant Clones

Horizon Instant Clones create computer objects in Active Directory. Horizon is configured with an Active Directory service account that must be granted permission to create computer objects. See Create a User Account for Instant-Clone Operations at VMware Docs.

  1. Create an OU in Active Directory where the Horizon Agent computer objects will be stored.
  2. In Active Directory Users & Computers, right-click the Horizon Agents OU, and click Delegate Control.
  3. In the Welcome to the Delegation of Control Wizard page, click Next.
  4. In the Users or Groups page, add the Active Directory service account for Instant Clones and/or Horizon Composer. Then click Next.
  5. In the Tasks to Delegate page, select Create a custom task to delegate, and click Next.
  6. In the Active Directory Object Type page, do the following:
    1. Change the radio button to select Only the following objects in the folder.
    2. Check the boxes next to Create select objects in this folder and Delete selected objects in this folder.
  7. Click Next.
  8. In the Permissions page, check the boxes next to Read All PropertiesWrite All Properties, and Reset Password. Then Next.
  9. In the Completing the Delegation of Control Wizard page, click Finish.
  10. If you are viewing Advanced Features in Active Directory Users & Computers, if you view the properties of the OU, on the Security tab, click Advanced, find your service account, you should see permissions similar to the following.

Events SQL Database

Horizon 2103 (8.2) and newer support PostgreSQL. See Prepare a PostgreSQL Database for Event Reporting at VMware Docs.

Horizon 2106 (8.3) and newer support SSL to the events database. See SSL Connection to Event Database at VMware Docs.

A new empty SQL database is needed for storage of Horizon Events.

  1. Only SQL Server authentication is supported, so make sure it’s enabled on your SQL Server > Properties > Security page.
  2. In SQL Server Management Studio, create a new database.
  3. Name it VMwareHorizonEvents or similar. Switch to the Options tab.
  4. Select your desired Recovery model, and click OK.
  5. Under Security > Logins, add a SQL login if one does not exist already. Windows authentication is not supported.
  6. Right-click a SQL login, and click Properties.
  7. On the User Mapping page, check the Map box next to the VMwareHorizonEvents database.
  8. On the bottom, add the user to the db_owner database role. Click OK when done.

Horizon Consoles

On the desktop of the Horizon Connection Server is an icon to launch Horizon Administrator Console. This console no longer needs Flash. The older Flex console has been removed from Horizon 2006 and newer. Don’t use Internet Explorer.

The URL entered in the browser must either be, or the Secure Tunnel URL (Horizon Console > Settings > Servers > Connection Servers tab > Edit). By default, the Secure Tunnel URL is the FQDN of the Connection Server.

If you don’t use one of these URLs then you’ll see a Login Failed message.

If you want to use a different URL than the Secure Tunnel URL (e.g., short name instead of FQDN, or load balanced name instead of server name), then go to C:\Program Files\VMware\VMware View\Server\sslgateway\conf, edit or create locked.properties file, and enter the following:


More details at VMware 2144768 Accessing the Horizon View Administrator page displays a blank error window in Horizon and 85801 Cross-Origin Resource Sharing (CORS) with Horizon 8 and loadbalanced HTML5 access. allowUnexpectedHost defaults to false in Horizon 2306 and Horizon 2212.1 and newer. Another option is to add portalHost entries as detailed at Allow HTML Access Through a Gateway at VMware Docs.


Horizon Licenses are available either as product keys or as cloud subscription licenses. For cloud subscription licenses, download the Edge Gateway from the Horizon Cloud next-gen control plane and connect it to a Connection Server. See Deploying a Horizon Edge Gateway for Horizon 8 Environments at VMware Tech Zone.

If not a cloud subscription license, then product keys can be entered in the Horizon Console:

  1. Open Horizon Console.
  2. Login using a Horizon administrator account.
  3. On the left, expand Settings and click Product Licensing and Usage.
  4. In the right pane, on the top left, click Edit License.
  5. In the Edit License window, enter your Horizon 8 (Horizon 2006) license serial number, and click OK. Horizon 7 license keys will not work.
  6. Licensing information is displayed:
    • License expiration is shown.
    • Instant Clones are available in all editions. See Horizon Perpetual Feature Comparison.
    • Application Remoting (published applications) requires Horizon Advanced Edition.
    • Teams Optimization requires Horizon Advanced Edition.
    • Session Collaboration requires Horizon Enterprise Edition.
    • Help Desk tool requires Horizon Enterprise Edition.
    • App Volumes requires Horizon Enterprise Edition.
    • Smart Policies (Dynamic Environment Manager) requires Horizon Enterprise Edition.
    • Rest APIs require Horizon Enterprise Edition.

Horizon Administrators

To configure Horizon Administrators:

  1. In Horizon Console, expand Settings, and click Administrators.
  2. On the right, near the top, click Add User or Group.
  3. In the Select administrators or groups page, click Add.
  4. Enter the name of a group that you want to grant Horizon Administrator permissions to, and click Find.
  5. After the group is found, check the box next to the group (or highlight the group), and then click OK.
  6. Continue adding groups, or just click Next.
    Note: This wizard only lets you select one role; so, only add groups that will have the same role assigned. You can run the wizard multiple times.
  7. In the Select a role page, select the role (e.g. Administrators or Help Desk Administrators, which grants access to the Help Desk tool). Then click Next.
  8. Select an Access Group to which the permission will be applied and then click Finish.
    • Access Groups let you designate permissions to specific pools instead of to all pools.
    • Federation Access Groups are available in Horizon 2103 (8.2) and newer and let you restrict admin permissions to specific Global Entitlements (Cloud Pod Architecture).
    • In Horizon 2206 and newer, Help Desk role can be assigned to Access Groups.
    • Note: If you intend to integrate Horizon with VMware Identity Manager (aka VMware Access), then only pools in the Root Access group will sync with Identity Manager (VMware Access). Other Access Groups won’t work.

Help Desk Website

Horizon has a web-based Help Desk tool built into Horizon Connection Server.

  • In Horizon Console, simply enter a user name in the search box at the top of the page.

The Desktops and Applications tabs let you see what the user is entitled to. You can even export these lists.

On the Sessions tab, click a session to see more details.

On the Details tab, scroll down to find action buttons like Remote Assistance. These buttons are kind of hidden.

Keep scrolling down and you’ll see Logon Segments.

The Processes tab lets you end processes in the user’s session.

Notes on the Help Desk feature:

  • Enterprise Licensing – Help Desk tool requires Horizon Enterprise edition license, or Horizon Apps Advanced edition license. Horizon Standard Edition licenses do not include this tool. The Product Licensing page indicates if Help Desk is licensed or not.
  • Horizon has a built-in Help Desk Administrators role that enables members to use the Help Desk tool.

    • Add Help Desk users to the Administrators and Groups tab, and assign them one of the Help Desk roles.
  • 15 minutes of History – There’s only 15 minutes of collected metric data.

See Using Horizon Help Desk Tool in Horizon Console at VMware Docs.

vCenter Connection

Horizon must connect to vCenter for several reasons:

  • Power manage the virtual machines
  • Create new virtual machines using Instant Clones
  • Update virtual machines using Instant Clones

See the Product Interoperability Matrix for supported vCenter versions.

If you are adding multiple vCenter servers to Horizon, make sure each vCenter Server has a Unique ID. In vSphere Client, go to the vCenter Server > Configure > Settings > General > Edit > Runtime Settings, and confirm that the ID is unique for each vCenter server.

To add the vCenter connection:

  1. In Horizon Console expand Settings, and click Servers.
  2. In the right pane, in the vCenter Servers tab, click Add.
  3. In the VC Information page, do the following:
    1. In the Server address field, enter the FQDN of the vCenter server.
    2. In the User Name field, enter the previously created Active Directory account (domainname\username) that Horizon will use to login to vCenter.
    3. Also enter the service account’s password.
    4. Horizon 2106 (8.3) and newer have a Deployment Type drop-down. If on-premises, leave it set to General.
  4. Click Next.
  5. If you see a message regarding invalid certificate, click View Certificate. Then click Accept.

  6. In Horizon 2012 and newer, View Composer is no longer an option.
    1. In Horizon 2006, in the View Composer page, select Do not use View Composer. There’s no need to use Composer since all editions of Horizon 2006 and newer include Instant Clones. Click Next.
  7. In the Storage page, do the following:
    1. Reclaim VM disk space requires IOPS during its operation. It’s only useful for the rare persistent Instant Clones use case and thus is generally unchecked.
    2. Check the box to Enable View Storage Accelerator and increase the host cache size up to 32768. Notes:
      • View Storage Accelerator is required for Instant Clones replica disks.
      • The cache size value is removed from RAM and that RAM is no longer accessible to virtual machines.
      • Higher host cache sizes should speed up Instant Clone Smart Provisioning (without parent image).
  8. Click Next.
  9. In the Ready to Complete page, click Submit.

Instant Clone Domain Accounts

If you plan to use Instant-Clone to create non-persistent virtual desktops, then add an administrator account that can join machines to the domain.

  1. In Horizon Console 2012 and newer, on the left expand Settings, and click Domains.

    1. In Horizon Console 2006, on the left, expand Settings and click Instant Clone Domain Accounts.
  2. On the right, the Connection Server tab shows the domains that the Connection Servers see.
  3. On the tab named Instant Clone Engine Domain Accounts, click Add.
  4. Select the domain.
  5. Enter credentials of a service account that can join machines to the domain. Click OK.

Restrict Remote Access

The Users and Groups node has a Remote Access tab. If you add groups or users to this tab, then only these groups and users can login through Unified Access Gateway (UAG).

Users not in the list can’t login through Unified Access Gateway (UAG).

Disable Secure Tunnel

By default, internal Horizon Clients connect to Horizon Agents by tunneling (proxying) Blast or PCoIP through a Horizon Connection Server. It would be more efficient if the internal Horizon Clients connect directly to the Horizon Agents instead of going through a Connection Server.

  • If the tunnels are enabled, and if you reboot the Connection Server, then user connections will drop.
  • If the tunnels are disabled, then rebooting the Connection Server will not affect existing connections.

To disable the tunnels:

  1. In Horizon Console, on the left, expand Settings, and click Servers.
  2. On the right, switch to the Connection Servers tab.
  3. Click the Connection Server to highlight it, and click Edit.
  4. On the General tab, uncheck the boxes next to HTTP(S) Secure Tunnel and the PCoIP Secure Gateway.
  5. For Blast Secure Gateway, change it to Use Blast Secure Gateway for only HTML Access connections to machine. Click OK.

Event Database and Syslog

To add the Events Database:

  1. In Horizon Console, on the left, expand Settings and click Event Configuration.
  2. On the right, under Event Database, click Edit.
  3. In the Edit Event Database dialog box, do the following:
    1. Enter the name of the SQL server.
    2. Select Microsoft SQL Server as the Database type. Note: Horizon 2103 (8.2) and newer have an option for PostgreSQL.
    3. Enter the name of the database.
    4. Enter the SQL account credentials (no Windows authentication).
    5. Optionally, enter HE_ (or similar) for the Table prefix. This allows you to use the same Events database for multiple Horizon installations.
  4. Click OK.
  5. Horizon 2106 (8.3) and newer support SSL to the events database. See SSL Connection to Event Database at VMware Docs.
  6. On the right, in the Event Settings section, you can click Edit to change the age of events shown in Horizon Console or Horizon Administrator.
  7. To add a Syslog server, look on the right side of the page.
  8. There are configuration options for logging to a file (Events to File System).
  9. You can go to Monitor > Events to view the events in the database.

Event Database SQL Index

VMware Knowledgebase article – The Event database performance in VMware Horizon View 6.x and 7.0.x is extremely slow: Symptoms:

  • The Event database performance in VMware View 6.0.x is extremely slow when browsing within View
  • High CPU usage on the SQL server, hosting the Event database
  • The larger the Event database becomes, the slower the queries run.

To resolve this issue, create an index. Run this command on your SQL Event database:

CREATE INDEX IX_eventid ON dbo.VDIevent_data (eventid)

Substitute VDIevent_data for the table name using your Event database prefix.

Event Queries

VMware Fling – Horizon View Event Notifier: collects and sends the alerts via email (SMTP) to users that are specified during the configuration process. It allows aggregation of alerts across multiple Horizon View Pods and for near real-time alerting of Horizon View alerts that are otherwise very difficult to be notified on.

Chris Halstead – VMware Horizon View Events Database Export Utility: this utility allows administrators to easily apply very detailed filtering to the data and export it to .csv. You can filter on time range,  event severity, event source, session type (Application or Desktop), Usernames and Event Types.  The application allows for extremely granular export of data.   The exported columns can also be customized and the application will export data from both the live and the historical tables in the View Events Database.

VMware Knowledgebase article 2089816 – Creating SQL views to retrieve the top 50 maximum number of concurrent desktop sessions over a period: This article provides steps to create database views to retrieve the maximum number of concurrent desktop sessions over a period from the event_historical table.

To retrieve the top 50 maximum number of concurrent desktop sessions over a period time from the event_historical table, run this query:

select Count, Time from(select top 50 DOB.<prefix>_data_historical.IntValue as 'Count', DOB.<prefix>_historical.Time as 'Time' from DOB.<prefix>_historical.DOB.<prefix>_data_historical where DOB.<prefix>_historical.EventID = DOB.<prefix>_data_historical.EventID and DOB.<prefix>_data_historical.Name = 'UserCount' and DOB.<prefix>_historical.EventType='BROKER_DAILY_MAX_DESKTOP order by DOB.<prefix>_historical.Time DESC) A Order by Time

Where <prefix> is the prefix for the event table. You can find the prefix that you must use by examining other view definitions, such as user_events.

Global Settings

  1. In Horizon Console, on the left, expand Settings and click Global Settings.
  2. On the right, under Global Settings, in the General Settings tab, click Edit.
  3. Set the Horizon Console session timeout. 4320 minutes (72 hours) is the maximum.
  4. Forcibly disconnect users is an active session timeout. It is not an idle timeout in that it doesn’t care if the user is working or not. The default is 10 hours so consider increasing it. Note: this timer does not log the user out of Windows. Instead it merely disconnects the user and requires the user to logon to Horizon Connection Server again.

    • Horizon 2206 and newer let you configure messages shown to users before the forcible timeout occurs.
  5. Under Client-dependent settings you can set an idle timeout. This is a disconnect, not logoff.

    • In a pool’s Desktop Pool Settings, you can configure Log Off After Disconnect.
  6. Other methods of configuring an idle timeout for desktop sessions:
  7. Enable automatic status updates enables automatic updating of the table displayed in the top-left corner of Horizon Console.
  8. The Send domain list option is unchecked by default, which means users must enter a domain name instead of picking one from a list. Check this box (and uncheck Hide domain list) to restore functionality from Horizon 7.7 and earlier. See VMware Blog Post Changes in Logon for VMware Horizon.
  9. Make other changes as desired. Click OK when done.
  10. Horizon 2306 (8.10) and newer let you restrict which versions of Horizon Agent that users can connect to. Find it at Settings > Global Settings > Horizon Agent Restrictions.

Log On as Current User is also disabled by default. To enable this client feature:

  1. In Horizon Console, on the left, expand Settings, and click Servers.
  2. On the right, switch to the Connection Servers tab.
  3. Highlight a Connection Server and click Edit.
  4. Switch to the Authentication tab.
  5. Scroll down. Check the box next to Accept logon as current user. Click OK.

Client Version Restrictions

Horizon can restrict connections to a minimum version of Horizon Client.

  1. In Horizon Console, on the left, expand Settings, and click Global Settings.
  2. On the right, switch to the tab named Client Restriction Settings.
  3. Click Edit.
  4. For each client type, enter a minimum version number. Additional options are available if you scroll down.
  5. Block Additional Clients blocks all clients other than the ones you selected. One use case is to block HTML Access.
  6. You can customize the message that users see if their client is too old. This feature requires Horizon Client 2006 (aka 8.0) or newer.
  7. Click OK when done.
  8. The client version is enforced when you try to launch an icon.

Global Policies

By default, Multimedia Redirection is disabled. You can enable it in Global Policies.

  1. In Horizon Console, go to Settings > Global Policies.
  2. On the right, click Edit Policies.
  3. Set Multimedia redirection (MMR) to Allow, and click OK. Notice that Multimedia redirection is not encrypted.


Connection Server LDAP Backup can be configured in Horizon Console.

  1. in Horizon Console, on the left, expand Settings and click Servers.
  2. On the right, switch to the Connection Servers tab.
  3. Select a Horizon Connection Server, and click Backup Now. Backups can be found in C:\ProgramData\VMware\VDM\backups.
  4. To change automatic backup settings, Edit the Horizon Connection Server, and switch to the Backup tab.
  5. You can schedule automatic backups. See VMware 1008046 Performing an end-to-end backup and restore for VMware Horizon View.

Related Pages

61 thoughts on “VMware Horizon 8 Console Configuration”

    1. Is your Horizon Console connected to vCenter? When you created pools, did you select your vCenter? Or are you asking about physical desktops?

  1. Hey Carl,

    great instructions that you provide 🙂
    I had problems with the vCenter permissions. Two additional checkmarks had to be set under “Edit inventory” Create from existing and
    Create new. The two permissions are also listed in the Vmware Docs ^^

  2. I am trying to configure the Horizon Events database to use an instance on a Microsoft SQL server. I can’t seem to figure out or find in the docs the correct format to use in the Horizon Admin console.
    The domain is QADomain.Test
    The SQL instance is: SQL01\Instance01

    Should the database be configured like any of the examples below?
    The port the DBA set is 64125
    I can use ODBC64 on the Connection server to test a connection to the database using port 64125

  3. Starting from 2212.1 and 2306 VMware says:
    “The default value of security configuration setting allowUnexpectedHost has changed from true to false. This means that connections using the name or IP address of a proxy, gateway or load balancer that is not defined in locked.properties will fail, even if checkOrigin and enableCORS are both set to false. A quick workaround is to add allowUnexpectedHost=true to locked.properties.”

  4. Hi Carl,

    I stumbled upon your forum and figured I’d ask away, if you may provide some insight.

    Horizon 8 has been set up with several user profiles. For only one user, for some reason, when logging in, Outlook 2019 welcome screen pops up and connects to user’s account. However, upon log off and logging back in, Outlook welcome screen pops up again and registry keys deleted or not saved.

    All other user profiles work just fine expect for this one individual. I’m trying to narrow down the issue, if you can provide any possible insight or experienced something similar.

    Any help would be greatly appreciated!

  5. Hi Carl,

    We are having 4 connection servers in our environment an we have upgraded our Horizon Environment from 7.10 to 8.x(2111) but when i try to launch the desktop’s i can see the active sessions only for connection server 1. if launch firs desktop the active session will go to 1 and if launch 2, 3 & 4 then the session request should go to connection server 2,3 & 4 but still its going connection server 1 only.

    During the upgrade we have changed the servers name to maintain, So i am i missing any configurations here? Kindly help me to resolve the issue.

    1. On the Servers page, if you edit each Connection Server, there are URLs and Gateways. Are any of the Gateways enabled?

      1. i went to Settings -> Servers – > Connection servers and click on edit , on general each connection server and able to see below things.

        HTTP(s) Secure Tunnel – Not Checked
        PCoIP Secure Tunnel – Not Checked
        Blast Secure Gateway – Do not use Blast Secure Gateway Selected

        1. Are you load balancing your Connection Servers? Are all of them enabled on the load balancer?

          1. Yes, We are using F5 load balancer and in fact we are having the virtual name and IP to connect all 4 servers only the issue with broker session, when ever we launch any desktop then go and check in VMware Horizon console -> Dashboard and the active session count shows to connection 1 only.. need to understand why its not taking remaining connection servers. Kindly help me on it.

          2. No it’s not disabled.. all 4 servers are active state but the session shows only to connect in server 1

            But recently we have changed host names during the migration so I’m doubting if I have missed anything for session related configurations.

  6. For refreshing linked clones. I’d like to reduce the number of clients that can be refreshed all at one time. I’m assuming this is the setting for “Max concurrent vCenter provisioning operations” which appears to default to 20. I’d like to reduce it to 5 or 10, but I can’t find where to change this. Any help would be greatly appreciated. Thanks

    1. I think that’s a global setting for all pools using the same vCenter connection. Go to Configuration > Servers. First tab is vCenter. Edit. Scroll down to Advanced Settings.

      Pools have a setting for “Spare (Powered On) Machines”.

  7. Hi Carl,

    is it possible, that some of the privileges you’ve listed in “vCenter Role for Horizon” are leftovers from the View Composer era and are therefore not required anymore in an Horizon 8 (Instant Clone only) environment?
    For reference, see “View Composer and Instant Clone Privileges Required for the vCenter Server User” (https://docs.vmware.com/en/VMware-Horizon-7/7.13/horizon-installation/GUID-467F552F-3034-4917-A985-B5E5FEC5C68F.html) vs. “Privileges Required for the vCenter Server User With Instant Clones” (https://docs.vmware.com/en/VMware-Horizon/2111/horizon-installation/GUID-467F552F-3034-4917-A985-B5E5FEC5C68F.html).

    Also, I think “Migrate powered off virtual machine” (under “Resource”) should be “Migrate powered on virtual machine”, as per the VMware documentation linked above (referred to as “HotMigrate”).

      1. Perfect, thanks!

        I just did a fresh install of Horizon 8 (2111) and noticed something weird. When adding the vCenter server, it wouldn’t let me set the View Storage Accelerator default host cache size to more than 2048 MB, even though it says right there in the dialog that “Cache must be between 100 MB and 32,768 MB”.
        Have you ever encountered that? (Would you even recommend setting it at something like 32,768 MB?)

          1. We have an all-flash FC SAN and more than enough memory to spare.
            Would you set a high cache size in that case or is it simply not worth it?

          2. I would do as small as possible. I would disable it if Instant Clones didn’t need it.

          3. I just tried disabling VSA and then creating an Instant Clone pool.

            I get a prompt saying “For optimal performance, Instant Clone pools and farms require View Storage Accelerator to be enabled for the vCenter Server. If you do not wish to enable View Storage Accelerator, click ‘Ignore’ and you will be able to proceed with Pool creation without this feature.”.
            If I choose “Ignore” it looks like it’s letting me create the IC pool with VSA disabled. Have you ever tried that or would you advise against it?

          4. I don’t recall seeing that before. It would eliminate needing to wait for it to compute digest files.

  8. I am running Horizon 7.13. I am working with a larger active directory that takes a long time to poll. Is it possible to define a root OU that Horizon will work in to reduce the number of objects that need to be loaded?

  9. Has anyone else noticed on an existing farm you can’t modify settings because the ‘OK’ button is grayed out? I can’t do things like change the # of RDS hosts.
    I have found that the Horizon console is waiting for the Guest Customization tab to refresh. When this happens I can goto the Guest Customizaton tab and refresh it. Then I can make my modifications and click OK.

  10. Hi Carl, Thank you for sharing the excellent information and I have used most of it when I deployed to our infrastructure. Now I am trying to implement smart card authentication for the zero client and would appreciate if you could please help me on this. I followed some on-line docs but nothing worked. Best Regards!

  11. Can Horizon Console have the Interactive logon to show a warning before login? I know Horizon Client has it with “Display a pre-Login Message” under Global setting of General settings. Where is it for Horizon console?

  12. I wonder if you guys ever experienced that USB connect printers did not work using Horizon Client connecting to a remote Horizon VDI server? We had it working flawlessly in version 8.3 but not now in 8.4.

    1. I’d check and make sure that the VMware Printer Redirection Service in your master image is running and not stopped or disabled. Also check and make sure a GPO isn’t being applied either to the client machine or the Horizon VM that is possibly disabling printer redirection.

  13. Hi Carl,

    Wonder if it is possible to restore a connection server vdm lds backup on another server. I have followed VMware guide to restore and it only works on the same server but haven’t been able to make it work if it is a new one. Services appear to be running but web admin page never loads.

  14. Hi Carl,
    Would it be a good idea to use SQL Always On for the database? Our idea is use the same server for app_volume db and events db.
    Many thanks

    1. There’s no harm in using Always On. The events database just stores audit log and events so it’s not critical.

  15. Hello Carl,
    I would like to let you know that the permission for the Horizon vCenter Role reported on the official docs are missing the
    “Alarm” -> “Disable or enable alarm on entity” that is needed in order to disable a false memory warning for cp-parents instant clone parent VMs (the one that KB2151438 marks as solved).


    1. The only Horizon feature that uses SQL is Events. Horizon does not include SQL Express but you can easily download it and install it.

      App Volumes also uses SQL.

  16. Hi Carl, I came across your site when searching to resolve the Login Failed issue on our vdi cluster, and I think your settings work for Horizon 7, but there seems to be an additional step required in Horizon 8. I just got off with vcenter support, and they said the KB article has not been posted for Horizon 8 yet.
    In your “Horizon Consoles” section of this page, when editing the locked.properties file, in addition to the ‘checkOrigin=false’ attribute, I also had to add the ‘enableCORS=false’ attribute on the next line down, restart the service, and I was then able to log into the admin portal using the shared FQDN.
    If you want to test and update your notes, this might help someone else as well.
    Thank you for your write-up!

    1. Let me just clarify…They were also working on the earlier versions of Horizon 8, but it seemed to break with the most recent Horizon 8 updates applied in Q3 of 2021.

      1. I have now updated the article. Thanks for the suggestion to disable CORS. Let me know if anything else needs to be improved.

      1. If I’m reading that article correctly, would it be better to add a line for “balancedHost = loadbalandedviewurl.company.com” instead of “enableCORS=false”? Thus only allowing your primary local balancer URL to get around the “CORS” feature?

  17. Hello Carl!
    I searched for information about the Instant Clone Domain Accounts without success.
    Is it possible to add several Instane Clone Accounts in order to create pools in different domains without trust?

  18. Hello, my vcsa in mngmt network with esxi hosts. How to me add public domain network to working vcsa with horizon 8? Vcsa going to domain? Thx.

  19. Hello Carl,

    When I try to add vCenter 7.0.2 to Horizon 8.2 I receive an error message “Certificate validation failed”
    What could be the problem?

    1. Is it a custom certificate? Or is it the built-in VMCA certificate? Was the certificate revoked?

      1. Thanks for answering. It`s s bulit-in VMCA certificate. I even downloaded the certificate from vcenter and import it on horizon and tried also with different browser but no success. The weird part is that whatever I put in the fields (even wrong name of vcenter or wrong credentials), the message is the same.

        1. What operating system is your Connection Server? Any firewall or proxy between Connection Server and vCenter? Is outbound Internet blocked from the Connection Server?

          Do the Connection Server logs show any more info?

          1. Problem solved. It was some firewall between Connection Server and vCenter. Thank you for your time.

  20. Hi Carl,
    How do you think why Remote Access restriction may not work in Horizon 8 (2103)?
    I have Horizon 8 (2103), Horizon 7.9.0 and UAG 2103. If I point UAG to Horizon 7.9.0 Remote Access restriction work as expected. If I point UAG to Horizon 8 (2103) users from UAG can login even although no users added to Remote Access tab.

    1. In UAG > Horizon Settings > More, Gateway Location is set to External?

      In Horizon Console > Users and Groups > Remote Access, you added at least one group or user? If you don’t add anybody, then it allows everybody.

      I just tested UAG 2103.1 with Connection Server 2103 (8.2) and it works.

      1. The key words was “If you don’t add anybody, then it allows everybody. ”

        You saved my brain!! I have already install few version from scratch receiving same result, and asking yourself – why? While in other production setup all worked fine.
        Anyway this is strange logic, isn’t?
        Thanks a lot Carl!

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