Our existing Exchange 2003 STD installation runs on one server that host all exchange functions including OWA. We have around 150 mail boxes and our private store is close to the 75GB ceiling. We are planning to move up to Exchange 2010 on a virtual server. Can we duplicate our current setup and run all exchange rolls on a single server our do we need to use two servers and split out the Exchange rolls.

Thanks everyone for the feedback.