Level 1

22 points

Exchange account disappears in Mail after install of Mojave

When I installed Mojave last week my Exchange (Office 365) email account stopped working in the Mail app. Unable to rectify the situation, I deleted the account and then readded it. Seemed like a reasonable solution.

When I re-add, it accepts my user name and password, and loads in the account and beings to download my emails. For 30 seconds. And then the account just disappears. Like I never even added it. I have tried to add it through every possible method I know how, and in each and every one of them, it starts to download, loads in my inbox and folders, and 30 seconds later, disappears. I had deleted and re-added my gmail, with no problems, and my Exchange account will load through the outlook app (ugh), but not through the Mail app (my preferred program of choice).

Not sure how to fix it, or if it's just a bug in Mojave. I've seen on reddit that I'm not the only one with this problem - just curious if anyone has found a solution.

(And for the record, problem exists on my iMac and MacBook, but not my husbands MacBook, which he had not upgraded to Mojave. So pretty sure Mojave is the problem here).

MacBook (Retina,12-inch,2017), macOS Mojave (10.14)

Posted on Oct 8, 2018 9:27 PM

Top-ranking reply

Kevin Horton3

Level 1

20 points

Posted on Dec 7, 2018 11:32 AM

For me, this issue seems to be resolved with macOS 10.14.2. I had the problem with 10.14.1, and did the workaround of disabling iCloud Keychain, which allowed the exchange account to stay. I tried reenabling iCloud Keychain with 10.14.1, but that would cause the Exchange account to disappear. After updating to 10.14.2, I once again enabled iCloud Keychain, and the Exchange account is still alive, 18 hours later.

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39 replies

Jan 19, 2019 3:32 PM in response to lysmekah

I've been able to solve this problem using the workaround of disabling Keychain, but I'm wondering if there are any updates on better solutions since that solution was posted in November 2018?

Faffe

Level 1

4 points

Oct 30, 2018 11:12 AM in response to lysmekah

I had no issues, but after re-adding the Office 365 account to make use of Multi-factor authentication, this issue started immediately.

After multiple tries to add the account, I resorted to first removing the iCloud account. That seemed to work, the Office 365 account was not removed for at least 15 minutes. But sadly, after adding the iCloud account again, the Office 365 account almost immediately disappeared.

SWStead

Level 1

4 points

Nov 7, 2018 9:08 PM in response to lysmekah

I have exactly the same issue. It did not start with Mojave, but with Mojave 10.14.1.

It appears to be related to re-establishing an Exchange account. IT moved the exchange server and my account on Monday. When I re-established the account that afternoon this behavior started.

It occurs on a 2016 MBP 15" and a MacPro 5,1.

When the account disappears from one, it appears to be deleted from the other.

This does not seem to effect IOS connections to the exchange.

I have tried only having the mail option. No difference.

Once an exchange account is setup, it works for a few minutes to an hour, then requests a login. When you login the account disappears.

Essentially Exchange has become unusable. I am looking for any suggestions.

Nov 16, 2018 3:10 PM in response to lysmekah

Unfortunately none of the suggested fixes work for me. It started after I installed Mojave and had to recreate my Exchange account. The behavior is exactly as describe. I can create the account and log in, mail download starts but shortly after the accounts disappears. This occurs whether I create the account in calendar or mail, and whether I start mail in safe mode or not. In safe mode and with keychain disabled the account lasts a little longer but eventually disappears -- a few minutes to a few hours later. This is my work account so I need a fix as soon as possible. Any other ideas?

Nov 21, 2018 6:12 PM in response to askmrmac

Does not solve the problem, you are basically using an legacy mail protocol and removing MFA (Modern Auth) from the account...

Yes it works, but very poor security.

Oct 9, 2018 5:01 AM in response to lysmekah

I have the same issue - brand new 2018 MacBook Pro. Came with High Sierra, immediately upgraded to Mojave...then went to add an Exchange account (Office365) to Mail and it fails - same behavior. Adds Ok and begins to sync but after a few minutes, just disappears.... Do not have the issue on an older 2015 MacBook, however. Also upgraded to Mojave there, but the exchange account was already present ahead of time...

Jan 23, 2019 5:09 PM in response to rms0236

Just letting you know that the fix from the website link I posted on January 19th solved the issue for me - and it's been stable for 4 days now. I feel your pain, though. I was also dreading having to use Outlook for work. Maybe poke around a little more on that linked website for other options? Good luck.

lysmekah Author

Level 1

22 points

Oct 21, 2018 2:06 PM in response to steffanodashpero

I tried this - and it lasted for 45 minutes. Which is a new record. But still not a solution.

lysmekah Author

Level 1

22 points

Nov 7, 2018 9:09 PM in response to drowsychicken

not sure why this works - but it does. Hopefully apple will fix it to a point where this work around isn't required. But it's a short term solution. Thanks!

Nov 13, 2018 11:57 AM in response to drowsychicken

I tried this and it seems to be working... very short term work around through as I need key chain to share updated password across all apple devices

Nov 21, 2018 5:46 AM in response to MiamiPsychProf

anyone got an update on this?

Dec 23, 2018 5:24 AM in response to drowsychicken

This worked for me. I think is the easiest way until Apple fixes this bug.

Jan 19, 2019 3:56 PM in response to alicejeanius

So far, this is the only solution. Waiting for updates!!

Feb 20, 2019 8:25 AM in response to lysmekah

Okay that seems to have worked .... it has been 15 mins and it is still there .... has any more permanent work around turned up yet?

vlad0326

Level 1

4 points

Mar 11, 2019 8:56 AM in response to vlad0326

It’s been 3 weeks now and the solution works great.

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Exchange account disappears in Mail after install of Mojave