Please see GGP for using Group Policy Preferences instead of making an MST. 

To install the client via Group Policy you must first create a MST file which will contain your license key and site assignment key (if you plan on automatically assigning devices to a site).

Downloading and installing Orca
Note: If you already have a copy of Orca installed you can skip this step and go straight onto creating the MST file.

  1. Download the Windows Installer SDK.
  2. Install with the default settings.
  3. Once the installation is complete navigate to C:\Program Files (x86)\Windows Installer 4.5 SDK\TOOLS.
  4. Double click the orca.msi file to install Orca.
  5. Install with the default settings (select Typical when asked for the installation type).

Creating a MST File
Note: If you are wanting to use both the 32-Bit and 64-Bit installers you will need to run through this section twice, once for each MSI.

  1. Load Orca and click File > Open.
  2. Navigate to the location of the client MSI, select it and click Open.

  3. From the Transform menu, select New Transform.

  4. From the left table select Property.

  5. In the right portion of the window select the LIC property, double click the value cell and enter your license key.

  6. If you want the device(s) to be automatically assigned to a site during installation select the SITE property and enter the site assignment key into the value cell.  If you are planning on manually assigning the device(s) to a site after installation this step can be skipped.

  7. From the Transform menu, select Generate Transform.

  8. Give the file a name and click Save.

Configuring Group Policy

Note:  You will need so repeat steps 8 to 16 to configure both the 32-Bit and 64-Bit client installers if you have devices running both architecture you wish to install the client to.

  1. From Administrative Tools load Group Policy Management.

  2. In the Group Policy Management window, in the console tree, right-click the organizational unit containing the devices you wish to install the client to, and then click Create a GPO in this domain, and Link it here....

  3. Enter a name for the group policy object and then click on OK.

  4. Right click on the Group Policy Object you have just created and select Edit.

  5. Expand Computer Configuration > Policies > Software Settings.

  6. Right-Click Software Installation and select New > Package.

  7. In the Open dialog box, type the Universal Naming Convention (UNC) path that contains the MSI package.

  8. Select the installer you want to add and click Open.

  9. Under Select deployment method, choose Advanced, then click OK.

  10. In the Name field edit the value to distinguish if the installer is for the 32-Bit or 64-Bit version of the client.

  11. Select the Modifications tab and click the Add button.

  12. Locate the MST file you created earlier and click Open.
    Important: If you created an MST file for both the 32-Bit and 64-Bit installers make sure that you select the correct one for the MSI you are configuring.

  13. For 32-Bit MSI only

    1. Select the Deployment tab, click Advanced.
    2. Uncheck the option "Make this 32-bit X86 application available to Win64 machines", and click OK. This will prevent the 32-Bit MSI from being installed on 64-Bit devices.

  14. Click OK to close the window.  The policy is now configured to install the client.