Can the Exchange 2007 SP1 Edge Server role run under a Virtual Server 2005 R2 SP1 instance with 2003 x64 SP2 installed as the VS?

Hello Russ, You need to install Exchange 2007 SP1 on Windows 2008 & itrequires hardware virtualization softwareon Windows Server 2008 with Hyper-V technology, Microsoft Hyper-V Server, or any third-party hypervisor that has been validated under the Windows Server Virtualization Validation Program. Virtual Server issupported for Exchange 2003. Refere below support policy from Microsoft. Microsoft Support Policies and Recommendations for Exchange Servers in Hardware Virtualization Environments http://technet.microsoft.com/en-us/library/cc794548.aspx