Hi everyone, Is they a specific formula (like the one used for determining the number of GC's) for determining the number of Exchange 2003 Front-End to use? We current have two load balanced but our number of backend servers and users are increasing.

NO, There is no such formula avalibale as per my knowledge. its depend upon load on FE servers and your HA model. Generally placing two FE servers are enough in one site. Front-end server considerations in Exchange Server 2003:: http://support.microsoft.com/kb/822443/en-us Anil