Calendar- Share option is not present in OWA or Outlook

 Issue:


Calendar sharing option is not available neither in OWA nor in Outlook, So can't share the calendar.

Cause:

After checking OWA we found that it looks different.
Like in here: Outlook Web App opens in the light version - Exchange | Microsoft Learn
and as we checked this is the light version, but the customer didn't activate it and we can't undo the Light version option.
it turns out to be the web browser version not compatible.

Resolution:

we tried to log in in a different computer with a higher windows version, OWA and Outlook worked fine.

Other Information:

If your Browser version is not the Problem, then you can revert to OWA normal version by:

1. In Outlook Web App, select Options.Screenshot of the light version of Outlook Web App showing the Options button.

2. In the navigation pane on the left, select Outlook Web App version, and then clear the Use the Light Version of Outlook Web App checkbox.

3. Select Save at the top of the page.

4.Sign out of Outlook Web App. The next time that the user signs in to Outlook Web App, the user is presented with the standard version of Outlook Web App.

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