No Automatic Sync With Microsoft Exchange

May 9, 2018

I'm connecting via the Microsoft Exchange connector to a server. This works well, it's syncing contacts & calendar, but only when I start the sync manually, although the automatic sync is activated.
Is this a common issue due to energy saving? I was trying to give the app the rights to run all the time, but there is no app called (Microsoft) Exchange.

I was searching through the net but was not able to find any solutions or people with similar issues.

Any help? Any idea?