This is what I am getting. I am trying to installed exchange2007 on a MSWIN 2007 Server(LongHorn) Thanks Summary: 4 items. 0 succeeded, 1 failed. Elapsed time: 00:30:26 Copy Exchange FilesFailed Error:Installing product C:\Users\Administrator\Downloads\New Folder\exchangeserver.msi failed. Fatal error during installation. Error code is 1603. Last error reported by the MSI package is 'Module C:\Program Files\Microsoft\Exchange Server\Bin\ExSMime.dll failed to register. HRESULT -2147010895. Contact your support personnel.'. Fatal error during installation Elapsed Time: 00:04:04 Hub Transport RoleCancelled Client Access RoleCancelled Mailbox RoleCancelled

Exchange 2007 does not support Windows Server codenamed Longhorn. Support for Longhorn will come in a post-RTM service pack (don't know which one yet). Until then, supported platforms are Windows Server 2003 SP1 or Windows Server 2003 R2. For more information of requirements and dependencies, please see System Requirements at http://www.microsoft.com/technet/prodtechnol/exchange/E2k7Help/1e80857c-b870-4a6d-a0f4-ff7b3a7be037.mspx.

Thanks, that is what you get for messing around I will try it on 2003 Thanks Again

What about exchange server 2003? I am trying to create a virtual environment for testing with Longhorn Server as the DC and the exchange 2003 server on a seperate Virtual Machine (Windows Server Enterprise 2003 R2). I keep getting errors so I was going torevert to installing and setting up the DC on 2003 tne upgrading. I would really like to test how the environment would work with Longhorn Server (build 5600)

Any update on when Exchange 2007 will work with Server 2008? I saw one notice on a Microsoft page saying SP1, but SP1 Beta1 still won't install on 2008 b3, even though it passes dependancy checks.Thanks,Jason Scott Schnoll - MSFT wrote: Exchange 2007 does not support Windows Server codenamed Longhorn. Support for Longhorn will come in a post-RTM service pack (don't know which one yet). Until then, supported platforms are Windows Server 2003 SP1 or Windows Server 2003 R2. For more information of requirements and dependencies, please see System Requirements at http://www.microsoft.com/technet/prodtechnol/exchange/E2k7Help/1e80857c-b870-4a6d-a0f4-ff7b3a7be037.mspx.