Why are my events not showing up on my Microsoft calendar after updating my email security settings?

Verify your privacy settings: Ensure that the app has appropriate access to your online events.
Check and adjust the following settings:
- Your device privacy settings
- Your app settings
- Application-specific permissions
Verify the calendar sync settings: Make sure that you have enabled calendar sync in the app settings.
Check your device for out-of-date calendar updates: Ensure that the calendar you are using with the app is up-to-date with the latest event information.
Check for server-side errors: If the issue persists, check your server for any errors that might be preventing to you from accessing your calendar information.