What does that symbol mean?

Hi, Tommy

Good day!

Thank you for posting to Microsoft Community. We are happy to help you.

According to your description, the issue of your concern that you would like to know what's the meaning of the symbol "diamond." To be honor, I haven't seen this symbol before, even searched and tested.

Therefore, could you please hold the cursor into this symbol and see if there's prompted hint.

For the meeting issue, please be kindly to have a check on OWA - Outlook Web App and see if there's a same issue or not.

In addition, please allow us to know whether you're the creator or invitee of this meeting.

Thanks for your attempts from the above that will help us better locating the issue.

We're glad to help you and looking forward to your new updates.

Sincerely,

Alex | Microsoft Community Moderator.

Hi, Tommy

We would like to know if there's an update from you.

Sincerely,

Alex | Microsoft Community Moderator.

Hello,

I have a similar problem. I have a meeting from 9 weeks ago with this symbol in the lower right hand corner:

I get notifications for this meeting every time I get a notification for any other meeting. This is REALLY AGGRAVATING. Please help! I tried holding the cursor over this symbol, but there are no hints, it just gives me the meeting details.

If I try to cancel the meeting, I get a message saying:

When I try to open the meeting, to delete it or cancel it, I get this:

Please let me know if there is anything else I can try.

Mary C