09-20-2017 08:19 AM
09-20-2017 08:19 AM
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 app, Outlook.com, O365, and Exchange 2016.
Some of our users already installed iOS 11 and they are still able to send and receive emails.
Are there specific Outlook email features that would not work with iOS 11?
When will this restriction be rescinded?
09-20-2017 08:32 AM
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 - If you can‘t send an email with iOS 11 and an Outlook.com or Exchange mail account - "Apple is working closely with Microsoft to resolve the issue and will release a fix soon in an upcoming software update".
09-20-2017 08:34 AM
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.
09-20-2017 08:44 AM
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!
09-20-2017 02:44 PM
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:
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?
09-20-2017 11:08 PM
09-26-2017 01:12 PM
Is this issue fixed?
Found this article today:
Could you please confirm?
09-26-2017 01:21 PMSolution
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.