Having tried the MS Exchange 2013 sizer and got myself thoroughly confused, can anyone offer a straightforward answer to what spec server I should be looking at for the following:
Server will be a dedicated 2012 R2 VM (VMware), hosted in a remote data centre.
All Exchange roles on one "box".
No other Windows Roles.
150GB mail database
<1GB Public folder database
Currently have Exchange 2007 running on Server 2008 Standard, with 8GB RAM, 4x 2.8GHz. Performance is acceptable, if a little on the slow side.
I've read that Exchange 2013 requires 3x the performance of Exchange 2010 (let alone 2007).
I'd obviously rather overspec than get it bang on as there should always be some room for growth.
Any input would be appreciated.