Scheduling and managing events using Outlook.com calendar
Spam Calendar Events
This is a know issue. Microsoft is aware of the problem but there is currently no fix. Unless you are in an IT Managed Environment there is nothing you can do to stop them.
See the Answer by "Hornblower409 Mar 20 2026" in
https://learn.microsoft.com/en-us/answers/questions/5829157/scam-outlook-calendar-invites
You can vote for and comment on these Feature Requests:
(You must open the Feedback Portal link and "Sign In" at the top right of the Feedback page before you can vote).
- Prevent Meeting Spam
https://feedbackportal.microsoft.com/feedback/idea/598fe57a-ca81-f011-8151-7c1e5297e660 - Prevent Spam emails from creating Calendar Events
https://feedbackportal.microsoft.com/feedback/idea/29cad13e-0948-f011-a2da-7c1e529ed9e2