Active Directory Domain Services(R) contains multiple groups which match attribute . Only one Windows(R) group should be ...

Active Directory Domain Services(R) contains multiple groups which match attribute <%1>.  Only one Windows(R) group should be assoicated with each UNIX GID.

 With multiple Windows groups associated with one UNIX GID, Server for NFS cannot determine which Windows group to use to grant access to files.

 Try removing the duplicate UNIX GID entries.