I have a PowerShell script which checks the currently signed in user as part of its start-up process. I'm using .Net to do this by adding the assembly:
Add-Type -AssemblyName System.DirectoryServices.AccountManagement
$cUser = [System.DirectoryServices.AccountManagement.UserPrincipal]::Current
For almost everyone this works fine and I get a UserPrincipal object that I can use elsewhere, however there are a couple of users who get the following error when running it:
Unable to cast object of type 'System.DirectoryServices.AccountManagement.GroupPrincipal' to type 'System.DirectoryServices.AccountManagement.UserPrincipal'. At line:2 char:1
+ [System.DirectoryServices.AccountManagement.UserPrincipal]::Current
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OperationStopped: (:) [], InvalidCastException
+ FullyQualifiedErrorId : System.InvalidCastException
This is on a standard Windows 10 20H2 install and doesn't matter if PowerShell is running elevated or not. I've never seen this call return anything other than a UserPrincipal before, so I would be grateful for any advice: is this something I can deal with in code, or is there some underlying issue with the machines that are returning this exception?