Office 365 no longer syncing with native iOS Contacts & Calendar apps

%3CLINGO-SUB%20id%3D%22lingo-sub-1902625%22%20slang%3D%22en-US%22%3EOffice%20365%20no%20longer%20syncing%20with%20native%20iOS%20Contacts%20%26amp%3B%20Calendar%20apps%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1902625%22%20slang%3D%22en-US%22%3E%3CP%3EWe've%20been%20using%20Office%20365%20since%20May%202017%20and%20syncing%20with%20company%20iPhones%20has%20generally%20been%20smooth.%20I%20use%20the%20Outlook%20app%20for%20email%2C%20and%20the%20native%20iOS%20Contacts%2FCalendar%20apps.%20Last%20week%20we%20enable%20MFA.%20There%20was%20a%20bit%20of%20a%20hiccup%20getting%20the%20mail%20to%20flow%20to%20mobile%20devices%20again%2C%20but%20we%20seem%20to%20be%20past%20that.%20However%20i%20just%20realized%20that%20my%20phone%20calendar%20was%20not%20updating%20with%20new%20additions%20made%20on%20my%20PC.%20Further%20testing%20showed%20the%20calendar%20syncing%20was%20dead%20too.%20Based%20on%20a%20recommendation%20in%20post%20i%20saw%20(sorry%20lost%20the%20details)%2C%20I%20removed%20and%20re-added%20the%20Office%20calendar%20on%20my%20phone.%20It%20wiped%20all%20of%20those%20appointments%20(no%20surprise)%2C%20but%20will%20not%20sync%20them%20back.%20I%20know%20i%20can%20use%20the%20Outlook%20calendar%2C%20but%20prefer%20the%20native%20app%20to%20show%20other%20personal%20calendars.%20Also%2C%20it%20does%20not%20solve%20the%20problem%20of%20syncing%20my%203%2C500%20work%20contacts.%20Solutions%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1902625%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20Apps%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1912993%22%20slang%3D%22en-US%22%3ERe%3A%20Office%20365%20no%20longer%20syncing%20with%20native%20iOS%20Contacts%20%26amp%3B%20Calendar%20apps%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1912993%22%20slang%3D%22en-US%22%3E%3CP%3ENVM%2C%20worked%20it%20out.%20After%20many%20hours%20of%20fussing%20and%20fuming%2C%20and%20reading%20contradictory%20sync%20info%20on%20MS%20Azure%20AD%20pages%2C%20I%20solved%20it%20by%20logging%20out%20of%20Outlook%20on%20my%20iPhone%2C%20deleting%20the%20app%2C%20and%20deleting%20all%20connections%20to%20MS%20Exchange.%20I%20re-established%20the%20Exchange%20source%20for%20calendar%20and%20contacts%2C%20and%20they%20have%20been%20populating%20correctly.%20I%20have%20reinstalled%20Outlook%20but%20not%20yet%20logged%20in%20(real%20work%20needs%20doing).%20I%20have%20also%20confirmed%20that%20edits%20made%20to%20calendar%2Fcontacts%20on%20my%20iPhone%20propagate%20correctly%20back%20to%20Outlook%20on%20my%20PC.%3C%2FP%3E%3C%2FLINGO-BODY%3E
New Contributor

We've been using Office 365 since May 2017 and syncing with company iPhones has generally been smooth. I use the Outlook app for email, and the native iOS Contacts/Calendar apps. Last week we enable MFA. There was a bit of a hiccup getting the mail to flow to mobile devices again, but we seem to be past that. However i just realized that my phone calendar was not updating with new additions made on my PC. Further testing showed the calendar syncing was dead too. Based on a recommendation in post i saw (sorry lost the details), I removed and re-added the Office calendar on my phone. It wiped all of those appointments (no surprise), but will not sync them back. I know i can use the Outlook calendar, but prefer the native app to show other personal calendars. Also, it does not solve the problem of syncing my 3,500 work contacts. Solutions?

1 Reply

NVM, worked it out. After many hours of fussing and fuming, and reading contradictory sync info on MS Azure AD pages, I solved it by logging out of Outlook on my iPhone, deleting the app, and deleting all connections to MS Exchange. I re-established the Exchange source for calendar and contacts, and they have been populating correctly. I have reinstalled Outlook but not yet logged in (real work needs doing). I have also confirmed that edits made to calendar/contacts on my iPhone propagate correctly back to Outlook on my PC.