hi all, anybody can help to upgrade my exchange 200732 bit to exchange 200764bit.

You need 64bit hardware, it can not be installed on 32bit hardware and OS. Install 64bit Windows OS on 64bit hardware and install Exchange 2007 64bit edition.

Hi, It depends on the 64-bit processor, so you have to install 64 based Windows Server OS and then install Exchange Server. More information share with you: Exchange Server 2007: Platforms, Editions, and Versions http://technet.microsoft.com/en-us/library/bb232170(EXCHG.80).aspx Hope it helps. Xiu

Exchange 2007 32-bit is only for test purposes. A new install of the 64-bit version would be required.