Exchange and Global Catalog

One day, you cannot start the Exchange Service in Exch2 of branch office because the T1 connection is broken.

How can you ensure that Exchange Service in Exch2 starts even T1 connection is broken.

Solution: Configure the DC2 to be Global Catalog server.

If the users in branch office report that the email address resolution to user name is slow, you should configure the DC2 to be GC.

Every Outlook client is configured with the name of an Exchange server. Exchange servers use Active Directory and DNS to locate a global catalog server. When an Outlook client user opens the Address Book, or when a user composes a message and types a name or an address in the To: field, the Outlook client uses the global catalog server that is specified by its Exchange server to search the contents of the GAL or other address lists.