How to change Authentication Phone Number for office 365

Q: I just switch my phone number. How to change Authentication Phone Number for office 365?

A: There are two different situations.

1. The old phone or phone number still work.

Please refer to this post:

How to change MFA verification method

2. The old phone or phone number doesn’t work.

Please refer to this post:

One way or other, you need to have the follow screen popup for you to change the phone number.

Or view this step by step video:

Published by

Bob Lin

Bob Lin, Chicagotech-MVP, MCSE & CNE Data recovery, Windows OS Recovery, Networking, and Computer Troubleshooting on http://www.ChicagoTech.net How to Install and Configure Windows, VMware, Virtualization and Cisco on http://www.HowToNetworking.com