Planning and migrating a small organization from Exchange 2007 to 2013 (Part 6) :: Migration & Deployment :: Exchange 2013 Articles :: Articles & Tutorials :: MSExchange.org:
Planning for hardware… or rather in SMB these days…planning for how many virtual Servers you’ll need.
You’ll want at least one 2012 R2 license – as it gives you the rights to install two virtual servers. One will be your RWA/Essentials/DC role. The other will be your Exchange server. Then you’ll need to decide if there’s a key line of business application that will drive the need to purchase another server license. This doesn’t necessarily need to be on a second PHYSICAL server. You can place three server OS (or four since that second server purchase will give you the rights for two more virtual instances) on one physical server.
Then you’ll need windows cals, Exchange cals, and plan on RDS cals. Why do I say that? Because trust me you’ll find that going straight to the desktop via rdgatway is ultimately a lot easier. And to do that you need RDS cals to license this.
Plan on spreading the payments over a VL open license that lets you spread the payments over three years. This isn’t a OEM server deployment, you want to spread out these OS licenses to lower the sticker shock of the price tag of this set up.
As far as sizing… plan for growth and plan on having a raid set up in such a way that should one single drive fail, you have redundancies. We can take all day and all night to discuss the nuances of RAID 1+0, 5 and all that, but bottom line, we’re going to be sticking all of this stuff in one server so plan on redundancies for it from the get go.