Topic Last Modified: 2005-11-17

The Microsoft® Exchange Server Analyzer Tool queries Active Directory® directory service to determine the value of the isGlobalCatalogReady attribute of this server. A value of True for this attribute indicates that the directory server is also a functioning global catalog server, and a value of False indicates that the directory server is not a global catalog server

Then the Exchange Server Analyzer connects to port 3268 on the Exchange server to verify that the port is responding.

The Exchange Server Analyzer displays an error if the following conditions are true:

This message may be displayed in error if there is a firewall between the computer running the Exchange Server Analyzer and the global catalog server.

This problem typically occurs when the global catalog server check box has been selected but the server has not been restarted.

To correct this issue

For more information about promoting domain controllers, see Microsoft Knowledge Base article 304403, "XADM: Exchange Considerations for Promoting a Domain Controller to a Global Catalog Server" (