I have problems setting up exchange and I don't know if this is related to PA.
I already tried everything, deleting cache, deleting and re-adding account, deleting data of all related apps, playing around with the sync settings.... so the problem is that for email, it always gives me a sync error and the calendar just doesn't show up. If I go in settings in the calendar app, it just says no calendar for this account. It worked fine on stock android!
Thanks a lot!
BTW: I have a Nexus 5, latest PA beta