Contact your system administrator if this condition persists. To resolve this problem, obtain the latest service pack for Microsoft Office 2000. This problem was first corrected in Microsoft Office 2000 Service Pack 2. Instead, when Outlook is started, Outlook contacts the Exchange Server computer for referral to the global catalog server and stores the new global catalog server to the profiles registry key. This enables Outlook to gain access to the newly available global catalog servers.
Administrators can specify which global catalog server to use.
This feature is helpful for load balancing when Outlook connects to global catalog servers over slow links. If the preceding registry key is specified, Outlook tries to contact the global catalog server that is mentioned in the preceding registry key. Outlook gains access to this key in read-only mode. If the global catalog server is not available, Outlook tries to gain access to the global catalog server as described in the first step. You can reconnect to a different server by restarting Outlook or retry the operation when the server is reachable.