Archiving from an Exchange 2007 server which is running on Windows Server 2008 is now supported with Enterprise Vault 2007 SP3 or later. We know this has been a popular question from the field so hope this news is just what you wanted to hear.
NB. Running Enterprise Vault on Windows Server 2008 is not currently supported
The latest compatability guide can be found at: http://seer.entsupport.symantec.com/docs/276547.htm
Regards
EV Guys
