We have installed a new Exchange 2003 2-node Cluster to replace the old Exchange 2003 Server. Everything (mailboxes, public folders, recipient update services, etc...) has been transferred to the new Exchange cluster per Microsoft's instructions and the new server can function fine on its own with the old server's Exchange services stopped. The old Exchange 2003 server is a DC and contains a copy of the Global Catalog. The new Exchange 2003 2-node Cluster is not a DC per Microsoft's recommendations. We have 3 other DCs on the network and 2 of them contain Global Catalogs. The 3 DCs on the network are two Windows 2000 Servers and one Windows 2003 R2 server.
The Problem: When I remove the Global Catalog from the old Exchange 2003 Server, all Exchange functionality stops. Outlook on the clients can no longer communicate with either of the Exchange Servers even though there are other servers on the network that contain copies of the Global Catalog (one being the clients primary DNS server).
In Outlook on a client, if I look at the properties of the Global Address List, it shows the Microsoft Exchange Address List Provider as the old Exchange 2003 Server we are trying to retire. I believe this to be the problem, but I do not know how to change this value to the new server. I may also be way off on the problem, but none the less, I need to find a solution to retire this old server before it retires itself.