Businesses big enough to want sophisticated email and calendaring but small enough to need an outside IT contractor. Most of the places where I've seen this sc

Businesses big enough to want sophisticated email and calendaring but small enough to need an outside IT contractor. Most of the places where I've seen this scenario had between 10 and 50 employees. There are a lot of companies in this range, and the only software company that seems to be catering to their needs is Microsoft (which is drastic overkill in functionality, complexity, and price compared to most of their needs).