If you have changed your phone number or wish to change the phone number where your authentication text/call is received, here's how.
Remember, if you are using phone as your method of authentication then it has to be a device that only you use, and not a team phone.
Also - it's quicker and easier to use the Authenticator app. If you can use that, then follow the guide here: How to use the Authenticator app for Multi Factor Authentication.
To change your phone number
Step 1. On your work computer go to My Sign-Ins | Security Info | Microsoft.com
If you already have a phone number here it will show on this page, you will see the number listed. Click on Change.
Enter in your new number, and click save. This will update your phone number listed.
Step 2? There is no step 2!
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