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AlyssaL036's avatar
AlyssaL036
Brass Contributor
Dec 28, 2021
Solved

Outlook Calendar Groups Malfunctioning

Hello!   I’ve been having an issue with Outlook’s calendar groups since November 5th of this year. I believe the issue started almost immediately after Outlook went through a larger update (the one...
  • AlyssaL036's avatar
    AlyssaL036
    Nov 28, 2022

    I'll save anyone reading this thread some time - these are the two solutions that have worked for people:

    For me, it worked to repair my Outlook installation:

    It seems people have misunderstood my original solution. I did not "re-install" Outlook, I "repaired my installation" of Outlook. Those are two different things. I haven't had the issue since then. See this link to learn how to repair the installation: https://www.slipstick.com/tutorial/repair-office-outlook-installation/#:~:text=The%20steps%20are%20basically%20the%20same%20for%20all,the%20desired%20repair%20option%20and%20complete%20the%20wizard

    For others, it worked to uncheck "Turn on shared calendar improvements".

    1. File
    2. Account Settings
    3. Account Settings (Again)
    4. Email Tab
    5. Double Click Your Email In The List
    6. More Settings
    7. Advanced
    8. Uncheck "Turn on shared calendar improvements" Under "Microsoft 365 Features"
    9. Click Apply
    10. Click OK
    11. Exit Outlook Entirely
    12. Restart Outlook

    If it doesn't work after these steps, restart your computer and then check again before assuming this step hasn't worked. If another solution is found, I will edit this comment with that solution.

d_kennedy's avatar
d_kennedy
Copper Contributor
Oct 13, 2022
We've encountered this issue, too. Attempting to upgrade Office 2019 to M365 Apps. Calendar groups for some of our admin assistants are fine in Outlook 2019 but duplicate and get all messed up as you're describing once upgraded to the M365 Outlook App. For these users, it persists across computers, too. Meaning that if I upgrade to M365 Apps on a computer never used by either of these individuals and they login to the PC and then launch the M365 Outlook App, the calendar groups are still messed up. One user also reported wonky behavior with calendars in the Outlook app on her iPhone.

I'm happy to have discovered others with the same issue. I was just hoping for a resolution to the issue.
Henric Appelgren's avatar
Henric Appelgren
Copper Contributor
Oct 13, 2022

d_kennedy We found a solution after a while.. Under account settings (same place you add shared mailboxes) there is a checkbox for Microsoft 365 functions, we use Swedish display language so I`m not sure what the correct translation is but something like "Activate improvment for shared calendar"? When we untick that feature our calendars was working as usuall..

  • d_kennedy's avatar
    d_kennedy
    Copper Contributor
    Oct 13, 2022

    Thanks, Henric Appelgren, for that suggestion. It's worth knowing about but doesn't seem to resolve our issue. Thanks, too, to everyone who posted here because it gave me some ideas that helped me better understand the issue. Our issue seems to stem from the inability to add one individual's calendar to more than one calendar group. It is still possible to do so in Outlook 2019. I've had mixed results in the Outlook 365 App (I was able to do it once and haven't been able to since). In OWA, it's impossible to add from directory an individual's calendar if it already exists. The following appears at the bottom of the screen. 
    Trying to add individual's calendar to second calendar group.

    I'm going to guess that our admin assistants who schedule groups of individuals might need to use some other sort of group calendar. Organizationally, we've never worked that way and getting folks to rethink work and adopt collaboration tools like Teams is next to impossible.

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