Forum Discussion
Mac Mail - Outlook Exchange issues
Well, for whatever its worth it just went back to working again. Not sure if it was a Microsoft issue or an Apple issue but Exchange account/Mac Mail - Catalina is working just fine again.
Hi, I know it's not necessarily the answer you will be looking for, but as a fellow mac user, I find M365 mail accounts work much better with Outlook.
If it turns out that the upgrade to the latest Mac OS does indeed solve this for you, then trying Outlook until you update the Mac could be a workaround for you perhaps?
Well, for whatever its worth it just went back to working again. Not sure if it was a Microsoft issue or an Apple issue but Exchange account/Mac Mail - Catalina is working just fine again.
I have seen this behaviour both on Catalina and Big Sur multiple times: My incoming email from my Office 365 account is not shown in Apple Mail. Sometimes a Mailbox->Rebuild make them show themselves, but sometimes this doesn't work. It fixes itself after some time (once it took several days, yesterday it took around 24 hours). I saw even consistent behaviour and same timing on both my iMac and my MacBook (running Big Sur 11.1 for two weeks now). Outlook for Mac on both boxes however showed all incoming email from the same account just in time when they arrived.
So my guess it is interworking issue between Apple Mail and the Exchange part of Office 365, but only intermittently, but still repeating. No idea here to further track this down.
Thanks for adding your experience! I hope we can track it down at some point to pinpoint what the issue is and if there is something that can be done to fix it right away. I stopped having issues but since I've seen it more than once I know it can come back at any point.
- commanderclif
I just did some research: Problem is not occurring on a clean Big Sur MacBook Pro... One suspect could be Little Snitch - do you have this installed on your system?
