As many customer are working with BB server I always hear this question.. Can I run my BB Server on Hyper-V ?!!!

Okay..The answer from our experience is YES  BUT….. With limited support from RIM

BES 5.0 and Hyper-V has currently “limited” support from RIM ( Which means that this is a supported environment but RIM has not fully assessed the impact of  this configuration)  . Please check the support matrix from RIM for further details: http://na.blackberry.com/eng/support/software/server_compatibility.jsp#tab_tab_compatibility

So I would recommend BES installation on Hyper-V just in case that you have a small number of users with simple environment and polices. If you are planning to go with big implementation you should get direct contact with RIM before making up your decision.