Jan 05 2022 02:48 AM
Jan 05 2022 02:48 AM
One of our colleagues got a new PC and his Favorites and Calendar Groups are not properly synced from Exchange Online in Outlook 2016.
We have tried:
Unfortunately none of this helps.
It definitely seems to be an issue locally on the new PC
Starting Outlook with /ResetNavpane switch might solve the issue - but would also wipe out his (many) custom Groups and Calendars.
Does anyone know of a way to reset local NavPane settings and load from Online?
Preferably without resetting Online settings or creating new User Profile on PC.
Jan 06 2022 10:25 AM
All of our users are having the same issue, started with a few users on Jan 4, now every user is affected by the next day. You can add stuff and it will sync to the server, but it will not sync back down to other users. You can see the added items in OWA, but not on the local PC outlook app. I also contacted a 3rd party IT support company to help, since I did all the fixes you listed and some with nothing fixing the issue. After talking with the company, they too were having customers with the same issues. Looks to me it's server side related and not the local machine. We had to temporarily put all users to not cache public folders and turned off Cached Exchange mode. It's a workaround, but it's EXTREMLY SLOW working in Outlook for all users. I hope this issue is fixed soon.
Jan 07 2022 11:47 AM
I have this same issue and it started this week. Problematic computers stopped synchronizing on 12/29 and they throw sync errors after recreating the favorite and recreating the profile. The initial download is good, but subsequent changes fail to sync. This is what we get in the sync error:
8:30:27 Uploading to server 'https://outlook.office365.com/mapi/emsmdb/?MailboxId='blahblah'
8:30:27 Error synchronizing folder
8:30:27 The client operation failed.
8:30:27 Microsoft Exchange Information Store
Jan 11 2022 01:25 AM - edited Jan 11 2022 01:25 AM
Thank your for your replies @BenHendricksWC and @spookytay
Although I had hoped for an easy fix, it is nice to hear that we are not the only ones experiencing the issue. :)
May I ask what Outlook Desktop versions you are using at your organizations?
We are currently on Outlook 2016 (no 365 clients yet) - and I wonder if it might be a client compatibility issue?
Anyway I may end up opening a case with Microsoft, based on your feedback.
Will post results if anything usable comes from it.
Jan 11 2022 04:52 AM
We are using current version of Outlook Version 2112 (Build 14729.20194 Click-to-Run) Current Channel
Jan 11 2022 07:18 AM
Here's what I did and so far and it's working. I tried this fix before, but I didn't wait it out long enough for it to work, kept thinking Outlook froze after 20 minutes, and I would kill the process.
Here's what I did.
If you have more than one public calendar like I do, just repeat the steps for each one. I also turned "Shared Calendar Improvements" back on for each user. So far I've only tested minimal, but we can post something to the calendar and it will sync up with all the other users now.
Jan 11 2022 09:00 AM
I have local group policies as well as O365 policies that make cache mode changes difficult for my current handful of users that noticed the issue. All are running the latest O365 Outlook...
Another thread (Synchronization issue - Microsoft Community) appears to have finally received some attention with a reply from MS Agent/Moderator that they will investigate further.
Jan 11 2022 09:12 AM
It may still work for you. I had turn off "cached exchange mode" for all my users as a temporary work around to get things synced across all users. I had to turn it back on to do the fix. If your users have it enable, which I assume they do, it may still work. Just skip the step of turning it back on.
Jan 12 2022 04:26 AM
Feb 04 2022 03:12 AM
We have the same issue, also started on De3cember 29th.
Using the shared folder instead of thew favorites is not speedy enough when working over the internet, and sear5ches take a huge time.
Feb 08 2022 05:18 AM
Mar 09 2022 11:47 PM - edited Mar 09 2022 11:55 PM
Sorry for having been absent from the thread...
My original issue was only with shared calendars (meeting rooms, colleagues etc.) that users had added as favorites.
In conclusion it seems that there was an issue in late 2021, which broke sync with existing favorites from Exchange Online to Outlook Desktop Client.
However newly created Calendar "Favorites" seem to sync OK.
So the only workaround for us is currently to reset favorites (Outlook.exe /ResetNavpane) - and then recreate favorite lists.
EDIT: ...and now I see that the issue has also been reported "fixed" in the other thread previously mentioned... :)
Synchronization issue - Microsoft Community