Hey Mohammed M
Lemme help you out here, follow the below steps.
If you have the account already on MS Authenticator then remove it!
- Go to your MS account https://account.microsoft.com/
- Scroll down until you find "Security", expand the section and find and click the link "Additional security options".
- A little way down the page click the link "Add a new way to sign in or verify".
- Select "Use an app" from the popup dialog.
- click the link in the body text "set up a different Authenticator app." and you will be presented with a QR code
- Open the MS Authenticator app on your phone click the "+" to add an account, then click "Other (Google, Facebook, etc) Scan the QR code. Hope this helps, kindly accept the answer if it did thanks much.