We have Exchange 2010 and Office 2010. We've always had intermittent problems with calendars not syncing properly on our Iphones (mostly 6S and 7's). Sometimes you would see some calendar info, but not all of it. Usually if we turned the calendar function off and back on or if we deleted and recreated the mail account it would resolve itself. Some of our staff have IOS 10 and some have 11 - it doesn't seem to matter which one we have.
However, nothing is working and there is absolutely nothing on the calendar. We've deleted all of the old devices in Exchange, have deleted and recreated the mail account and still nothing.
Does anybody have any ideas??
I did install the MS outlook app and the calendar works fine there. However, no one wants to use that app! We may have to insist on it, but want to see if there are ideas out there for active sync.