Dears;i need to estimate the numbers of mailboxes that Exchange server 2003 can afford with my H/W configurationis there is a way to do that thanksjohn yassa

Take a look at this. http://msexchangeteam.com/archive/2007/01/15/432207.aspx http://www.msexchange.org/tutorials/Art-Science-Sizing-Exchange-2003-Part3.html http://technet.microsoft.com/en-us/library/aa997020(EXCHG.65).aspxMark Morowczynski|MCT| MCSE 2003:Messaging, Security|MCITP:ES, SA,EA|MCTS:Windows Mobile Admin|Security+|http://almostdailytech.com