why the limitation of Exchange? i use Exchange and Outlook too, but is there a specific reason this has to work with Exchange? I'd be curious as to what you end up with as it is on my list to track down in the near future. in looking for a solution for a different issue i came across HighRise - https://highrisehq.com/signup I've not used it, but on the surface it looks like it would work well for biz dev / sales. Likely browser-based.