can any one plz tell me how to install exchange 2007 in a server 2008 r2 in step by step plz....

First off, you will have to Install Exch 2007 WITH SP3 for 2008 R2 (it is the only version supported on R2): http://www.microsoft.com/downloads/en/details.aspx?FamilyID=1687160b-634a-43cb-a65a-f355cff0afa6&displaylang=en http://technet.microsoft.com/en-us/library/ff728623.aspx Then: http://technet.microsoft.com/en-us/library/bb125169(EXCHG.80).aspx http://technet.microsoft.com/en-us/library/aa998636(EXCHG.80).aspx http://technet.microsoft.com/en-us/library/bb123895(EXCHG.80).aspxTim Harrington | MVP: Exchange | MCITP: EMA 2007/2010, MCITP: Server 2008, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington

Totally agree with Mr. Harrington.