Office 365 vs. On-Premises Exchange Server
A large client is currently running Exchange 2010 and is evaluating moving to Office 365 vs upgrading to Exchange Server 2016. I talked with them about it and thought it would be useful to document it for future reference. If you are a very small organization, then Office 365 is a slam dunk. It's going to perform better and be more cost effective than your could ever implement on your own. This is even before we consider the cost of the the consultants to get your on-premises Exchange up and running. For mid-sized and large businesses there are more things to think about.... Cost Direct cost is the first thing everyone wants to evaluate when considering Office 365. Your exact costs are going to vary depending on how you want to implement Exchange and which Office 365 plans you think are appropriate. So, I'm going to let you figure out the exact costs, but here are the things you need to consider: On premises: Exchange Server licenses Exchange Server CALs (basic and enterprise i