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Brady Gilbert's avatar
Brady Gilbert
Copper Contributor
Nov 11, 2021

Duplicate calendar in desktop Outlook

9 users all have a "SharedCalendar" ((a Shared Mailbox) that they put all events on so that all users can see. They don't use their personal calendars at all.    Within the last couple of weeks, wh...
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office 365
outlook for windows
williama09's avatar
williama09
Copper Contributor

Brady Gilbert Did you ever resolve this issue? I am seeing the same experience every few months

AlyssaL036's avatar
AlyssaL036
Brass Contributor
Mar 06, 2023

williama09 
Here's what I learned from my own thread about this same issue:

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: How to Repair Your Office or Outlook Installation (slipstick.com)

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.

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