Description: NSPI Proxy can contact Global Catalog GCName but it does not support the NSPI service. After a Domain Controller is promoted to a Global Catalog, the Global Catalog must be rebooted to support MAPI Clients. Reboot GCName as soon as possible.
For more information, click http://search.support.microsoft.com/search/?adv=1.
If you restart the global catalog server, this does not fix this problem. Outlook 2000-and-later clients that connected before the problem occurred can still connect. However, new client connection attempts are not successful. This behavior occurs because of the cached value generated by the smart client feature and directory service referrals (RFR interface).
This issue occurs because the Name Service Provider Interface (NSPI) is not advertised by the global catalog server.
This problem is fixed in Windows 2000 Service Pack 3 (SP3).
To work around this problem, demote the domain controller from global catalog server status, restart the global catalog server, and then promote the domain controller to a global catalog server again.
NOTE: For information about promoting a Windows 2000 domain controller to global catalog server, see Online Help for Windows 2000 Server.
After the domain controller reports that it is successfully advertising as a global catalog server again (by logging Event ID 1119 in the Directory Service event log), restart the server to advertise the NSP interface.
Stop and then restart the Exchange services, or restart the Exchange Server computer. Exchange Server should now be able to contact the global catalog server.
For additional information about directory service referrals, click the article numbers below to view the articles in the Microsoft Knowledge Base:
256976 XCLN: How MAPI Clients Access Active Directory
302914 XCCC: How Outlook 2000 Accesses Active Directory
For additional information about Exchange 2000 considerations when you promote a Windows 2000 domain controller to a global catalog server, and about how to use the global catalog Partition Occupancy registry value to direct the global catalog promotion process to complete the full replication of all naming contexts before advertising itself, click the article number below to view the article in the Microsoft Knowledge Base:
304403 XADM: Exchange Considerations for Promoting a Domain Controller to a Global Catalog Server