This article demonstrates how to unregister an old or ‘rogue’ XenDesktop delivery controller that has already been taken offline and/or deleted and must be removed from the farm.

Requirements

Administrative access to the PowerShell console (right-click, Run as Admin or start from Citrix Studio, PowerShell tab)

Background

If a controller is deleted outside of Studio, the controller will remain in the farm and must be removed using PowerShell.

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Instructions

Complete the following steps to unregister an old or ‘rogue’ XenDesktop delivery controller that has already been taken offline and/or deleted and must be removed from the farm.

1. Back up the database before continuing.

2. Open PowerShell as administrator.

3. Run asnp Citrix* to load the Citrix PowerShell extensions.

4. Run Get-BrokerController to find the rogue controller’s SID, as displayed in the following screen shot:
   Note: The SID displayed in your session will vary.
   

5. Highlight and copy the SID (highlight and press Enter).
   Tip: Copy the SID to a Notepad window to prevent accidental deletion.

6. Run the following two commands to store the SID in a variable and remove the rogue controller from the database:
   $brokerSID = "[SID from above]" Get-ConfigRegisteredServiceInstance -ServiceAccountSid $brokerSID | Unregister-ConfigRegisteredServiceInstance

   

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This article demonstrates how to unregister an old or ‘rogue’ XenDesktop delivery controller that has already been taken offline and/or deleted and must be removed from the farm.

Citrix Documentation -  About the XenDesktop SDK