Hi, I have come across an interesting problem: A user with multiple group memberships and a primary group defined in Active Directory will not be a member of the Mail-Enabled Distribution Group that is said users primary group. Example: UserA is member of group GroupA, GroupB and GroupC in Active Directory. GroupA is user's primary group. GroupA, GroupB and GroupC are Mail-Enabled Security Groups in Exchange 2007 UserA will appear in the DGs GroupB and GroupC, but never in GroupA We assign drive mappings based on the primary group membership, that's why we need a primary group and I have worked around that issue by introducing dummy security groups, but I would like to get rid of that temporary fix! Is there a real reason for that behavior or is it a bug? System Info: Exchange 2007 SP2 Windows Server 2008 Windows Server 2008R2 domain level

On Tue, 17 Aug 2010 10:56:26 +0000, Xor99 wrote: >I have come across an interesting problem: > >A user with multiple group memberships and a primary group defined in Active Directory will not be a member of the Mail-Enabled Distribution Group that is said users primary group. That's because the primary group is treated differently to a regular "membership" in a group. It's an "AD thing" and not an Exchange problem. See this link http://support.microsoft.com/kb/275523 --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

That explains it. Thanks for the info!