VMware Horizon 7.1.0 Composer

Last Modified: Mar 19, 2017 @ 12:05 pm



vCenter Server planning:

  • A single vCenter Server can handle 10,000 VMs. However, this is a single point of failure. VMware recommends separate vCenter servers for each 2,000 VMs. More vCenter Servers means more concurrent vCenter operations, especially if your pools are configured for Refresh on Logoff.
  • Each ESXi cluster is managed by one vCenter Server.
  • Don’t use existing vCenter servers. Build separate vCenter servers for the vSphere clusters that host Agent VMs. Horizon licenses include vCenter licenses, so there’s no excuse to not use separate vCenter servers.

Horizon View Composer server planning:

A remote SQL Server is needed for databases:

  • vCenter database
  • Horizon Composer database
  • Horizon Events database
  • Supported SQL versions are listed at VMware Pubs.

SQL Server Preparation

Only SQL Authentication is supported.

  1. Open the properties of the SQL Server.
  2. On the Security page, make sure SQL Server authentication is enabled.
  3. Create a new SQL database for View Composer.
  4. Call it VMwareHorizonComposer or similar. Then switch to the Options page.
  5. Select your desired Recovery model, and click OK.
  6. View Composer only supports SQL authentication on remote SQL servers. Expand Security, right-click Logins, and click New Login to create a new SQL login.
  7. Name the new account.
  8. Select SQL Server authentication.
  9. Enter a password for the new account.
  10. Uncheck the box next to Enforce password policy.
  11. Then switch to the User Mapping page.
  12. On the User Mapping page, in the upper half, check the Map box for VMwareHorizonComposer.
  13. On the bottom, check the box for the db_owner role, and click OK.

SQL Native Client

  1. Go to the SQL 2016 Feature Pack and download sqlncli.msi.

  2. On the Horizon View Composer server, run sqlncli.msi.
  3. In the Welcome to the Installation Wizard for SQL Server 2012 Native Client page, click Next.
  4. In the License Agreement page, select I accept, and click Next.
  5. In the Feature Selection page, click Next.
  6. In the Ready to Install the Program page, click Install.
  7. In the Completing the SQL Server 2012 Native Client installation page, click Finish.


  1. On the View Composer server, run ODBC Data Sources (64-bit).
  2. On the System DSN tab, click Add.
  3. Select SQL Server Native Client, and click Finish.
  4. Enter the name HorizonComposer for the DSN, and enter the SQL server name. Click Next.
  5. Change the selection to With SQL Server authentication, and enter the credentials of the new ViewComposer SQL account. Then click Next.
  6. Check the box next to Change the default database, and select the VMwareHorizonComposer database. Then click Next.
  7. Click Finish.
  8. Click OK twice.

Install – Composer

  1. Don’t install on Horizon Connection Server: Horizon Composer cannot be installed on the Horizon Connection Server. They must be separate machines. Horizon Composer is typically installed on Windows vCenter server if less than 1,000 linked clones.
    1. Extra Memory for vCenter: If you install Horizon Composer on a Windows vCenter server, VMware recommends adding 8 GB of RAM to the server. See VMware 2105261 Intermittent provisioning issues and generic errors when Composer and vCenter Server are co-installed
    2. vCenter Service Account: if you install Horizon Composer on a Windows vCenter server, login as the same account that was used to install vCenter. See VMware 2017773 Installing or upgrading View Composer fails with error: The wizard was interrupted before VMware View Composer could be completely installed
  2. Internet access for CRL checking: If the Horizon Composer server does not have Internet access, see VMware 2081888 Installing Horizon View Composer fails with the error: Error 1920 Service VMware Horizon View Composer (svid) failed to start
  3. Certificate: If you install a certificate now, Composer installer will prompt you to select it during installation. Or, you can replace the certificate later.
  4. Install: Go to the downloaded View Composer 7.1.0, and run VMware-viewcomposer-7.1.0.exe.
  5. If you’re prompted to install .NET 4.6.1, click Yes.
  6. Then run the downloaded NDP462-KB3151802-Web.exe.
  7. Check the box next to I have read and accept the license terms, and click Install.
  8. In the Welcome to the Installation Wizard for VMware Horizon 7 Composer page, click Next.
  9. In the License Agreement page, select I accept the terms, and click Next.
  10. In the Destination Folder page, click Next.
  11. In the Database Information page, enter the name of the ODBC DSN.
  12. Enter the SQL account credentials (no Windows accounts) and click Next. For remote SQL databases, only SQL accounts will work. The SQL account must be db_owner of the database.
  13. The VMware Horizon 7 Composer Port Settings page appears. If you already installed a valid certificate on the Composer server, select Use an existing SSL certificate, and select the certificate. Click Next.
  14. In the Ready to Install the Program page, click Install.
  15. In the Installer Completed page, click Finish.
  16. Click Yes when asked to restart the computer.
  17. If you encounter installation issues, see VMware 2087379 VMware Horizon View Composer help center

Administrator Permissions

If View Composer is installed on a standalone server (not on vCenter), Horizon Connection Server will need a service account with administrator permissions on the View Composer server. Add your View Composer Service Account to the local Administrators group.

Composer Certificate

  1. Open the MMC Certificates snap-in (certlm.msc).
  2. Make sure your Composer certificate private key is exportable, by exporting the certificate, and making sure Yes, export the private key is a selectable option.

  3. Stop the VMware Horizon 7 Composer service.
  4. In the certificates console, double-click your Composer certificate. On the Details tab, note the Thumbprint.
  5. Run Command Prompt as Administrator
  6. Change the directory to C:\Program Files (x86)\VMware\VMware View Composer.
  7. Run sviconfig -operation=replacecertificate -delete=false.
  8. Select the certificate that matches the thumbprint you noted earlier.
  9. Then restart the VMware Horizon 7 Composer service.

SQL Database Maintenance

SQL password: The password for the SQL account is stored in C:\Program Files (x86)\VMware\VMware View Composer\SviWebService.exe.config. To change the password, run SviConfig ‑operation=SaveConfiguration as detailed at VMware 1022526 The View Composer service fails to start after the Composer DSN password is changed.

Database Move: To move the database to a new SQL server, you must uninstall Composer and reinstall it. See VMware 2081899 VMware Horizon View Composer fails to work properly after migrating the Composer database to a new SQL server

Related Pages

17 thoughts on “VMware Horizon 7.1.0 Composer”

  1. If I am upgrading from 7.0.3 does horizon require a new license for 7.1 or does It use the previous 7.0.3 license with no additional purchase?

    Great post !

  2. I would recommend to install server certificate before Composer installation and simply select existing certificate, instead of perform replacement steps.

  3. You mention not to use existing vCenter servers, this is exactly what I am being asked to do and am trying to find a good explanation as to why we shouldn’t do it this way. How would you explain that this isn’t the best way to do it?

    1. It’s more of a best practice than a requirement. If you have more than a couple hosts running View Agent machines, then I put them in their own cluster managed by their own vCenter. This eliminates version dependencies with the rest of the vSphere infrastructure. And allows the full vCenter to be delegated to the Horizon Admins.

  4. Important note about installing VMware View Composer
    If you plan to install or upgrade View Composer 7.0.2, you must upgrade the Microsoft .NET framework to version 4.6.1. Otherwise, the installation will fail.

  5. In update to this, I switched to the SQL Server driver and this now works. I have not completed the installation as everywhere says not to do this and to use the native driver.

    Any thoughts on this?

  6. Carl I am getting an issue of “the database specified is not supported by vmware horizon 7 composer” any ideas why that would be?

    I am using server 2012 R2, SQL2014 and the ODBC Driver 11 for SQL Server.


    1. I found the correct driver it must be the from the SQL server 2012 feature pack!

      Thanks and sorry for all the comments

  7. Is this Installing Horizon View Composer fails with the error: Error 1920 Service VMware Horizon View Composer (svid) failed to start (2081888) applies for Windows Server 2012 R2 ?

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