Get-ADMemberOf.ps1

function Get-ADMemberOf {
  # A fast and accurate way of determining all of the groups
  # one or more users are part of, especially useful when the groups are nested.
  
  # Example:
   # import-module ActiveDirectory
   # get-aduser <username> | Get-MemberOf | ft
  
  param(
    [Parameter(Mandatory=$True,ValueFromPipeline=$True,ValueFromPipelinebyPropertyName=$True)]
    [string]$DistinguishedName
  )
    
  begin {}
  process {
    $tokens = get-aduser -SearchScope Base -SearchBase $DistinguishedName -Properties tokengroups -LDAPFilter '(objectClass=user)'
    
    $tokens.tokengroups | % { 

      $objectProperties = @{ "GroupName" = $_.Translate([System.Security.Principal.NTAccount]); 
                             "SamAccountName" = $tokens.SamAccountName }
        
      New-Object -TypeName PSObject -Property $objectProperties

    }
  }
  end {}
}