I would say it is probably both. calendaring tech is actually much harder than most people believe. both for usable design and efficient implementation. I say t

I would say it is probably both. calendaring tech is actually much harder than most people believe. both for usable design and efficient implementation. I say that having worked on the outlook.com/hotmail team a few years ago. and interestingly this is the second calendaring acquisition microsoft has done, having bought jump.com back in 1999.