When I use get-ADPrincipalGroupMembership on users who are member of a groups with a slash ("/") in its groupname I receive the following error:
Get-ADPrincipalGroupMembership : The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework 3.0 SDK documentation and inspect the server trace logs.At line:1 char:31+ Get-ADPrincipalGroupMembership <<<< ecomor + CategoryInfo : NotSpecified: (ecomor:ADPrincipal) [Get-ADPrincipalGroupMembership], ADException + FullyQualifiedErrorId : The server was unable to process the request due to an internal error. For more informa tion about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the cl ient, or turn on tracing as per the Microsoft .NET Framework 3.0 SDK documentation and inspect the server trace logs.,Microsoft.ActiveDirectory.Management.Commands.GetADPrincipalGroupMembership