Using Outlook for Android in business environments for email and scheduling
I've got the same issue. Contacts doing the same thing only not as frequent as 4 hours. Reset account, deleted account, uninstalled Outlook and reinstalled. All give the same temporary fix as turning the sync back on. Seems to have happened with latest Outlook update. I love missing meetings because the reminders disappear when the calendar unsyncs.
Version 4.2311.1