Is Android v5.0.2 incompatible with Microsoft Exchange Servers for Calendar sync?

[AC Question]

I just bought a Samsung Galaxy S6 with Android v5.0.2 and cannot get my work calendar tosync. Getting email and contacts to sync, but no calendar data. Really dissatisfied as I use this phone for work and really need a calendar. Is this an Android bug for incompatiblit with exchange servers? Is it widespread? Can anyone tell me if Android is planning a patch to fix this? Wish I would have just kept my S3. Never had a single problem with that phone. Thought I was "upgrading" and this is what I get...