hi i installed exchange server 2003 in my server i installed exchange server 2007 in another server i wnat to take the mail backup from exchange server 2003 and i restore it back in exchang eserver 2007 how we have to do that we can do that in exchange server or we have to use any third party tools plz assist me

No, you cannot restore backup of Exchange 2003 to Exchange 2007. But why you wan't to do so since you have both server running, move the mailboxes from Exchange 2003 to 2007...Moving Mailboxeshttp://technet.microsoft.com/en-us/library/bb124797.aspxAmit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com

why because taht exchange 2003 server is crashed int not booting proper thats y i installed fresh exchange server 2007 in another server i want to take entair mail in this server that is the problem

In that case, you need to bring Exchange 2003 server up by restoring or with /DisasterRecovery switch of Exchange 2003 setup.Recovering a Failed Exchange 2003 Member Server Using the Disaster Recovery Switchhttp://www.msexchange.org/tutorials/Recovering-Failed-Exchange-2003-Member-Server-Using-Disaster-Recovery-Switch.htmlOnce, 2003 server is up, move all mailboxes and decomission it properly. You can not simply restore Exchange 2003 backup on Exchange 2007 server.Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com