December 1, 2022
On Thursday, December 8, 2022, several security improvements will be applied to Microsoft online services (including Teams, OneDrive, and Sharepoint):
- Downloads of potentially malicious files will be prevented by SharePoint online.
- User reporting of fraudulent multi-factor authentication requests will be enabled.
- Guest accounts will be denied access to enumerate users and groups in Azure.
- Microsoft 365 email users may see a notification when receiving an email from a sender for the first time.
No significant user impact is expected.