Dear All Our customer have environment of Windows 2003 Active directory and they have Exchange 2003 Organization so now they buy new exchange 2010 license and they need to implement it, should I recommend them to upgrade their infrastructure to windows 2008 active directory or let’s them implement with windows 203 active directory, and they need to publish OWA by ISA 2006, I’m not sure it support Exchange 2010 or not Please let’s me know which way is good design ( if you have link of document for reference please give it to me too ) Thank you for your support

The best will be to go 2008 r2 on the domain level. ISA will only publish the OWA and it has nothing to do with the version of exchange. This might help you out http://technet.microsoft.com/en-us/library/aa996719.aspx http://www.itwire.com/business-it-news/technology/26723-windows-server-2008-r2-forces-exchange-2010-upgradeRaj

The best will be to go 2008 r2 on the domain level. ISA will only publish the OWA and it has nothing to do with the version of exchange. This might help you out http://technet.microsoft.com/en-us/library/aa996719.aspx http://www.itwire.com/business-it-news/technology/26723-windows-server-2008-r2-forces-exchange-2010-upgrade Raj Thank you for your sharing! Exchange 2010 Prerequisites: http://technet.microsoft.com/en-us/library/bb691354.aspx Rapid transition guide from Exchange 2003 to Exchange 2010: http://msexchangegeek.com/2010/01/30/rapid-transition-guide-from-exchange-2003-to-exchange-2010/ ThanksYour expertise never fails to impress :)

An addition to the above.. Deployment Assistant will help you plan and do the correct steps http://technet.microsoft.com/en-us/exdeploy2010/default.aspxJonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog