If you’re exchange admin or exchange developer who want to test/evaluate/create sample application(s), then you can download the following Exchange Server 2007 x64 for Hyper-V and Exchange Server 2007 SP1 VHD’s for Virtual PC, Virtual Server.
You can use this for a limited period and try it; you can evaluate the new capabilities of Exchange Server 2007, which deliver the advanced protection your company demands, the anywhere access people throughout your organization want, and the operational efficiency you need.
Download fully configured Exchange Server 2007 SP1 x64 (64 bit edition) VHD (works with Hyper-V):
You can download Exchange Server 2007 x64 (64 bit edition) VHD from the following Microsoft download location: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=db31866c-2cd5-4610-8505-5f2572248618
Note: To use this above VHD, you need to have Hyper-V enabled machines to work with this build.
Download Exchange Server 2007 SP1 VHD (works with Virtual PC, Virtual Server):
You can download Exchange Server 2007 SP1 VHD from the following Microsoft download location: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=e99f2a96-ffbc-4323-9676-9657607c4a52
Note: A virtualization product that supports the VHD format is required to use this virtual machine. Microsoft Virtual PC or Microsoft Virtual Server are provided for free and can be used with these VHD based virtual machines.