This faster release cycle is designed to support organizations that use hybrid messaging scenarios.
Generally speaking you should always refer to the Tech Net article as it will document the latest requirements and limitations for a public folder migration.
We hired a new staff member yesterday and so I set her up on our Office 365 account, per usual. When I pulled up the calendar on my Outlook 2016 for Mac and highlighted Corporate Calendar, all it did was show "sync pending for this folder." It never would update.
I gave her access to the Public Folder we use for a shared Corporate Calendar. So, I cleared my cache and unsubscribed from the calendar.
One of our users complains that he cannot synchronize mail from his Mailbox in the cloud (Exchange Online).
We try to use a couple of tricks (usually turn off and turn on windows), but no luck.