Hi, Windows Server 2008 R2 ist not listed at http://www.microsoft.com/downloads/details.aspx?FamilyID=e17e7f31-079a-43a9-bff2-0a110307611e&DisplayLang=en at the system requirements. Is it supported to install this MAPI version 6.5.8165.0 on Windows Server 2008 R2 (with Exchange 2007 SP3) ? Regards, Rainer

As long as you use the latest version, it works fine. Although ensure that your application supports Windows 2008 R2, as not all do. Simon.Simon Butler, Exchange MVP. http://blog.sembee.co.uk , http://exbpa.com/