Exchange sync issues with Apple Mail app on macOS Monterey

Ok, I've finally managed to get my Mail to communicate with Exchange. I first removed my old Exchange email account and then reopened it. I noticed that under User Name it had my email address so once I changed that back to my User Name and entered server address manually. That did the trick.

Do you have third-party anti-virus installed such as Avast/AVG? These are known to cause problems with iCloud mail, see https://discussions.apple.com/thread/253303599?login=true&page=1. If you do, turn it off or try a Safe Boot.

Have you tried changing password for your exchange email? It worked on one of my macs.

Ivica

I am having the same issue with the mail app, but with Gmail mail. I have tried everything in the book and have had a case with apple tech support for 3 weeks now, they have finally given up and say this is a known issue but engineering does not have an answer and they are looking into it. How long that will take is not known, I was told it might be weeks or months before this is fixed. I find it very interesting that OS Monterey is having issues with apple's own applications, but it works fine with 3rd party applications. I am having similar issues with iMovie since I upgraded to Monterey. This new OS launch seems to be the most problematic in recent history and very interesting that they have not had any updates since launch. It is unfortunate that apple has turned into an organization that doesn't really care about functionality as long as they can sell more iPhones.

See https://support.apple.com/en-gb/guide/mac-help/mh21245/mac

This is essential trouble-shooting, see if the problem persists.

This is an Apple Exchange interface bug, plain and simple

Me too! I deleted the Exchange account and then re-added it. It took days to update on Mac Mail and then ... all is well.

Did you resolve this? I have the same exact issue. Removed exchange mail account from MBP and phone. Reinstalled and still can't get incoming mail on MBP. I can send mail on the MBP, just cant receive. All is fine on the phone.

Same issues. Have been using exchange with apple mail for years without issue. I have a MacPro and MacBook Pro. Both upgraded to Monterey. Now mail app does not work. I tried deleting my exchange account. When I type in password with the connect automatically option, it says the PW is wrong (it isn't). If I configure manually and paste in identical PW, it will work, mail will load all messages, but still won't send. Runs super slow/buggy and takes forever to open messages. I have tried starting in safe mode. No difference. Help!

After upgrading to Monterey, Mail will not retrieve new mail from Exhange. I tried creating a new Exchange account, but then Mail lost all my folders. (With Outlook I can see that they are still in Exchange, so not lost forever, fortunately.) I have tried safe reboot, restarting Mail, moving the folders in ~/Library/Mail/ away, editing the Internet account, all to no avail.

I have also looked at the log messages in Console, but see nothing obviously broken there (except that no mail is being retrieved). Would anyone at Apple be helped by my log messages in locating the issue?

So, from reading the thread above there is a bug which has yet to be rectified by Apple, correct? I installed Monterey last night and am OK on my iPhone with my Microsoft Exchange email account in Mail, but no on my MacBook Pro, which is both frustrating and time consuming. I have switched to Outlook in the meantime. Might someone from Apple let us customers know what the situation is? I do not want to waste my time nor my IT vendor's time trying to rectify the issue if it is indeed a bug which is going to be addressed in the next update.

Apple has been totally unresponsive. I have spent hours with their help desk and no one has a solution. They just say they know of this bug and their engineers are looking into it. Meanwhile, this has been going on since Monterey launched over a month ago and still no update or fix. Very frustrating.

Thanks to BillyWilder for investing the time to find out that Apple knows of the bug and is looking into it. Let's hope they're still committed to Mac users. In the meantime Outlook is working okay for me, at least.

Have you considered uninstalling Monterey?