Jan 19 2022 04:44 AM
Hello.
We're an MSP and since around 17th/18th Jan we've had one or two users in 7 different companies (tenants) report issues with shared mailboxes or shared calendars they have access to not updating.
We've been able to get working again by simply unticking option in Outlook profile to cache shared mailboxes.
But with this amount of clients with the same issue, I've not been able to see anything regarding known M365 health / windows update issue that causes this in the last few days. Anyone else seen this issue and know root cause or have any acknowledgement of known issue
Jan 19 2022 07:07 AM
@gblackburn came here because we are having the same issue with multiple users. I will try your fix but this bug needs to be worked out.
Jan 19 2022 08:20 AM
Jan 19 2022 12:01 PM
@gblackburn My company is having the same issue, since we don't install the account in account settings there is no way to cache the inbox. Anyone find a fix for this yet?
Jan 19 2022 11:44 PM
I've picked up the same issue 19/01/2022 with multiple users using various shared mailboxes. Any advise would be helpful
Jan 20 2022 05:38 AM
We have the same issue on multiple users and multiple shared mailboxes, since Jan 10 2022
Jan 20 2022 05:40 AM
@MicheleRJ tried the shared mailbox cache off and it worked for 10 min and then same thing again
Jan 21 2022 09:51 AM
Jan 21 2022 10:26 AM
Jan 21 2022 02:57 PM
@gblackburn I've seen the same thing with multiple users. First report was January 20th.
Jan 21 2022 03:23 PM
Jan 21 2022 07:15 PM
Jan 24 2022 03:56 AM
Jan 24 2022 04:02 AM
I managed to fix the problem by manually going to the few people who had the issue, removed the "Download shared folders" tick under Advanced in Account management, close Outlook and open it up again. Then going back intro the same settings and switch it back on again. This will start a sync of the Shared mailbox back to the OST file and update automatically again. Hope this helps until we know why this started happening.
Jan 24 2022 04:31 AM
Jan 24 2022 04:37 AM
Jan 25 2022 10:10 PM
Jan 26 2022 06:13 AM - edited Jan 26 2022 06:15 AM
Experiencing the same behavior since mid Jan indeed. Seems clearly a bug, as it's getting more widespread. Unchecking 'use cached mode' fixes it, but that's not a real solution.
Jan 27 2022 03:19 AM
@gblackburn We're having the same issue too accross lots of mailboxes, we do not have the IT resource to go around and manually rebuild all the profiles, or change the cached mode, we need an urgent fix!