HI.. I HAVE 2 SERVERS (PDC,BDC). I INSTALLED EXCHANGE 2003 ON PDC ONE YEARS AGO, AND TODAY I INSTALLED EXCHANGE 2003 ON BDC. 1-HOW CAN I COPY MAILBOX ON PDC TO BDC?(I WANT KEEP EXCHANGE AND MAILBOX ON PDC) 2-HOW CAN I SYNCHRONIZE THEASE 2 SERVER FOR EXCHANGE MAILBOX? I WANT PLAN THAT , WHEN PDC SERVER FAILED, BDC SERVER WORK SAME PDC (EXCHANGE MAILBOX). I KNOW THAT BDC IS MIRROR OF PDC ON ACTIVE DIRECTORY, BUT I WANT EXPAND IT FOR EXCHANGE 3- HOW CAN I DO THIS? THANKS BEST REGARDS.

Native in Exchange 2003 there is no way to simonize mailboxes. A cluster is the usual method to provide redundancy. You would need to look at Exchange 2007 provides better methods for moving data from one server to another. Andrew Sword, MVP

Hi, I agree with Andrew. Only Exchange 2007 can meet your requirement. For more information, please refer to the following articles: Understanding Exchange Server 2003 Clusteringhttp://technet.microsoft.com/en-us/library/aa997507.aspx Cluster Continuous Replication -Exchange 2007http://technet.microsoft.com/en-us/library/bb124521.aspx Regards, Elvis