Forum Discussion

Iron Contributor

Sep 20, 2017

Solved

iOS 11 issue?

Microsoft made an urgent announcement in the Office 365 admin web to not install iOS 11 because it will disrupt sending and receiving emails if you are accessing Exchange email from the iOS 11 mail a...

Cian Allner
Sep 26, 2017
Yes, this is confirmed in the Apple support article I linked to previously, which has been updated to say this been fixed in the iOS 11.0.1 update, which is now available.

Cian Allner

Silver Contributor

Sep 20, 2017

Outlook for iOS is fine and not affected by these compatibility issues as I understand it. This is only when using the native email app with an Office 365 mailbox, as well as the other scenarios you have mentioned. This is where you might see an error message that says "Cannot Send Mail. The message was rejected by the server".

A fix is being worked on asap, as is also confirmed here - https://support.apple.com/en-us/HT208136 - "Apple is working closely with Microsoft to resolve the issue and will release a fix soon in an upcoming software update".

EmyLoanzon

Iron Contributor

Sep 20, 2017

The employees who upgraded to iOS 11 are using the Apple native mail app connecting to their Office 365 Exchange Online accounts. They are able to send and receive emails.

Very confusing announcement.

Cian Allner
Silver Contributor
Sep 20, 2017
That's interesting. Now you mention it, I have seen other reports that not everyone is affected by this, so your mileage may vary. With Apple and Microsoft confirming the issue, it's must be a thing but we will have to wait for additional guidance before we have any more particulars. Confusing indeed!
- AllenFilush
  Microsoft
  Sep 20, 2017
  Hey all - happy to help clarify this. What is the confusing piece?
  - EmyLoanzon
    Iron Contributor
    Sep 20, 2017
    Microsoft's announcement states that users who upgrade to iOS 11 and they use the Apple Native Mail App to connect to Exchange Online or Exchange 2016 will have email send and receive problems.
    
    Some of our employees upgraded to iOS 11 - they use the Apple mail app to connect to their Exchange Online email. They are still able to send and receive email.
    
    In other environments, users in this scenario are not able to send and receive emails anymore.
    
    Teg Badhan posted this article:
    
    https://www.petri.com/ios-11-exchange-not-kissing-cousins
    
    Not sure if Microsoft will patch their Exchange 2016 back end servers to resolve the issue. Any ETA as to when Microsoft and Apple will roll out a fix for this issue?