If you want to find out if a user is a particular known group you can use... WindowsIdentity wi = WindowsIdentity.GetCurrent(); WindowsPrincipal wp = new WindowsPrincipal(wi); wp.IsInRole("Administrator"); //or whatever the role is. Getting a list of Groups a user is a member of is more difficult the last time I needed to do it I used the WinNT ADSI provider with the DirectoryServices classes... ----------------------------------------------------------------------- Shaun Austin: .NET Specialist. Spreading the word of .NET to the world... well the UK... well my tiny corner of it!! :-D