Details:
If you use the Microsoft Authenticator app to approve your work sign-ins to Microsoft 365 you are going to start being asked to select the number you see. This is to prevent accidental approvals.

You may also see:

  • Application context: Shows which application you are signing into
  • Geographic location context: Shows your sign-in location based on the IP address of the device you are signing into

Availability:
Due by default late February 2023, but your organisation may implement this sooner.

Source, related links, and references:
MC468492. 
Advanced Microsoft Authenticator security features are now generally available! – Microsoft Community Hub.

Page originally published:
21st November 2022 and kept up to date.