I asked this same question about 2 years ago but am asking it again in hopes someone may have found an answer since I just came across the same problem.
In our VDI setup on Windows Server 2012 R2, we have a collection containing many virtual desktops. The last one that was created was assigned to a user but never used. The user was deleted from AD but the virtual desktop was never assigned to anyone else. Now when I look in the collection from server manager it shows it's assigned to a SID (since the user is gone).
Now when I try to assign it to someone else I get an error of:
Could not assign the virtual desktop DESKTOP1 to the user account USER1. Exception: Could not assign the virtual desktop USER1 to the user account DESKTOP1.
That is not a typo. It does in fact say in the second part of the error that the virtual desktop is the user and the user account is the virtual desktop. Very strange.
I have tried with different users, all who can be assigned to different virtual desktops. I have tried with users who don't have rights and I get the generic permissions error. I have also tried through powershell and have gotten this:
set-rdpersonalvirtualdesktopassignment : Failed to set the personal virtual desktop assignment.
At line:1 char:1
+ set-rdpersonalvirtualdesktopassignment -collectionname "Collection1...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException
+ FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Set-RDPersonalVirtualDesktopAssignment
When I run get-RDPersonalVirtualDesktopAssignment in PowerShell, it is the only one not listed (though I see a SID in the GUI) and subsequently when I tried to remove the assignment, it comes back with:
Remove-RDPersonalVirtualDesktopAssignment : The specified virtual desktop has not been assigned to any user.
I know I can go ahead and create a new one but I'm wondering if anyone else has come across this before and knows how to fix it. I hate creating a new one because VDI creates them sequentially and this leaves a gap in the names. I also wonder if there is a way to tell VDI to create a new virtual desktop using a name that has been deleted.
Thank you.