iPhone X unable to connect to Exchange mail on iOS 11.1 - iPhone 7 Plus OK

To solve the issue I had to enter into webmail. Then to Options, then Phone. Here I had to delete a Exchange ActiveSync partnership. And voila, all was synchronising again.

I've not experienced any issues with my Exchange account on my iPhone X. I'm using iOS 11.2.5, and have updated through all of the iOS 11 series. I suggest you contact your Exchange Administrator. They can back trace your connection and ensure that your device is connecting to the server and if there is an issue with the connections. They are the ones that control connections.

And by the way. If you don't need more than 10 Exchange ActiveSync partnership, you don't have to contact your administrator. You can do it all yourself (see above). I would assume there aren't many user who sync their exchange account with more than 10 devices...

I have solved my problem. It has to do with the number of associated ‘partnerships‘ Exchange can use. The maximum number is 10. See: About Microsoft Exchange Server account device limits - Apple Support

Same issue for me. Started a few days ago randomly. Would work sometimes then not work then work. Now I just deleted my Exchange profile on my iphone X and added it back and its not connecting. I know all settings are correct. I only have 3 devices listed in OWA settings. Something is going on.

Where can I find it.

Hi. If you're asking about the limit on devices for an Exchange account, you need to ask the administrator of the server.

This did not fix my issue. Still cannot get my mail.

My company IT has no idea why either.

Is there a separate profile for iPhone X? It worked properly on an a separate iPhone with the same OS 11.1 what’s different about how the iPhone X accesses Exchange?

I tried using Outlook App too and that does not work either.

Tried strengthening the passcode that did not work.

I have the same login problems since I received my iPhoneX yesterday. My iPhone7 plus works with Exchange, my iPhoneX won’t load anything and says the server is unavailable. Both run iOS 11.2 public beta 3. I would REALLY like a solution for this problem, otherwise I think I have to return the X (even though I really like it so far).

Hi. Do you need to install a Profile to access the Exchange server? You'd need to get that from your admin.

This worked for me too.

Bro, many thanks. 👍

Worked for me! Thanks!