iPhone 6 upgraded to iOS 10 and now Outlook calendar not syncing I have a Micosoft Outlook 2013 calendar account synched on my iPhone.  Since I upgraded the iPhone to iOS 10.0.1, the calendar is not upating.  I tried changing the calendar setting from push to fetch and back, and turning off the calendar in the account and re-adding it and neither worked.  Email for the same account is updating routinely with no issues.  It has been nearly 2 days, and because turning the calendar account temporarily off wiped the old data and it has not synched since I turned it back on again, I have nothing.  Please help me!
It looks like a minor iOS bug preventing iPhone from working with Outlook data. I think the best way is to wait for a week or two till Apple will fix the problem in one of the upcoming updates.

If you need to solve this issue asap, try Akruto: http://www.akruto.com/sync-iphone-with-outlook/

It works like an Exchange server, so if that wouldn't work that means Apple messed up with Exchange ActiveSync technology in iOS 10.0.1 and you still need to wait for a new iOS release.