Outlook Calendar Issues. Meanwhile, please try sharing this problematic calendar via owa to check the issue. Share your calendar in outlook.com.
You have not installed the latest updates. Share your calendar in outlook.com.
This Problem Occurs For One Or More Of The Following Reasons:
The outlook team is investigating this issue.
If That Doesn't Solve Your Issue, Try The Solutions Below.
You will see a list of your email accounts.
Also, Check If You Find Any Report In The Sync Issues Folder By Following Steps.
Images References :
Outlook Is In Use By Another Process.
In the meantime, please use the following workarounds:
Resources For The Top Outlook Issues In.
Download the outlook calendar diagnostic.
Meanwhile, Please Try Sharing This Problematic Calendar Via Owa To Check The Issue.