Exchange use DSaccess service to find a set of available directory service servers: GC, Configuration, and DC.
By default, DSAcess is configured to perform "Automatically discover servers".Scenario: Each office has one exchange server 2003 to host all mailboxes for users in that office. Users in branch office report that sometimes it takes several minutes to send email from EXCH2. You discover that a large amount LDAP queries is passed from the branch office to DC1 of head office. You confirm that DC2 is configured as Global Catalog server.
Solution:
Exchange System Manager-- locates the Exch2 object -- properties -- Directory Access tab -- Specify the DC2 as the dedicated Global Catalog server.
