After upgrading some of our servers to Server 2012 R2, we’ve discovered a bug in the PowerShell 4.0 Get-ADUser cmdlet. When running the command Get-ADUser username -Properties *, the cmdlet returns the following error:
Get-ADUser : One or more properties are invalid.
Parameter name: msDS-AssignedAuthNPolicy
At line:1 char:1
+ Get-ADUser username -Properties *
+ CategoryInfo : InvalidArgument: (username:ADUser) [Get-ADUser], ArgumentException
+ FullyQualifiedErrorId : ActiveDirectoryCmdlet:System.ArgumentException,Microsoft.ActiveDirectory.Management.Comm
Mike F Robbins researched the error in the following blog post, and determined that the issue occurs with PowerShell 4.0 run against Server 2008 R2 domain controllers. The issue is that two attributes, AuthenticationPolicy and AuthenticationPolicySilo, exist in a Server 2012 R2 Active Directory but do not exist in a Server 2008 R2 Active Directory. The Server 2012 R2 RSAT tools expect the attributes to exist in both environments, so an error is returned in the Server 2008 R2 Active Directory environment.
As Mike points out, a good workaround is to use PowerShell implicit remoting to process the commands on the domain controllers themselves. However, in the meantime I’m able to process the command from other downlevel OS machines, which is fine in my case for now.
I’ve submitted the case to Microsoft Premier who has confirmed the bug and escalated to the Platforms Team. I’ll post updates here as I get them.