I have a network with currently 5 servers:
3 Windows 2008 Servers
2 Windows 2003 Servers
2 2008 Servers are domain controllers but, up until today, one of the 2003 servers was the PDC (for lack of a better term, it held all the FSMO roles). This server was also running Exchange 2003 which we have since migrated to Exchange 2007 running on a Server 2008 box. I was in this morning to begin the process of transferring all of the FSMO roles to the newest 2008 server so we can retire the old 2003 box.
I upgraded the AD to the newest, transferred all 5 FSMO roles to the new server as well as DNS and DHCP and waited for replication to complete.
I then shut down the old 2003 server to test logins to the network. Everything from the windows client side was clean and snappy. Drives mapped, printers worked, Outlook connected to Exchange. No issues with ANY Windows OS through XP , Vista and Windows 7.
The Macs however seem to have limited ability to connect to the network while the old DC is turned off. The login is EXTREMELY slow and mapped drives eventually function. They cannot connect to the Exchange Server at all. When I power the old server back up, the Macs can get back onto the network and all is well. I have tried unbinding a Mac from the domain and rebinding to the new domain controller. That process works fine but when I shut down the old DC again, the Mac is sluggish in the logon and still cannot connect to Exchange.
Any help of what I may be overlooking would be appreciated.