The user does not belong to this group.
This user is not a member of this group.
To see a list of users in this group, type NET GROUP <group name> if you are running Windows 2000 Server. If you are using Windows 2000, type NET GROUP <group name> /domain. The Windows 2000 workstation must be a member of a domain that is running Windows 2000 Server. Otherwise, you will see a message that tells you that NET GROUP is a Windows 2000 Server command only.