Hello, I have a requirement to detect whether Exchange is installed or not in the host and if installed what is the version of exchange like 2003/2007/2010. Can I detect using any registry keys ? ~Inmar

Hi Check out this http://support.microsoft.com/kb/152439 http://social.technet.microsoft.com/wiki/contents/articles/240.exchange-server-and-update-rollups-builds-numbers.aspx http://aspoc.net/archives/2010/01/13/how-to-determine-what-version-of-exchange-you-have-installed/ Thanks Prakash

Hi Inmar, If you want to check by registry key, please follow this path: HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > ExchangeServer > ClientAccessRole or MailboxRole Thanks.Rowen TechNet Community Support

Thanks Rowen. In our Exchange 2010 environment we have the key as "HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > ExchangeServer > v14 > ClientAccessRole or MailboxRole" How do I know whether Exchange 2010/2007/2003/... is installed and read respective keys ? Thanks Inmar

Hi Inmar, From my test environment, Exchange 2007 should be "HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > ExchangeServer > v8 > ClientAccessRole or MailboxRole" Exchange 2003 has not this key. Thanks.Rowen TechNet Community Support

Thanks for you reply.