Update phone number on account

To update the phone number on a Microsoft 365/Office account, change the phone number on the underlying Microsoft account or, if an admin account, in the Microsoft 365 admin center.

For a personal Microsoft account (used for Microsoft 365/Office subscription):

1. Go to Manage how you sign in to Microsoft at https://account.live.com/names/manage and sign in.
2. Choose Add phone number.
3. Follow the prompts to verify the new phone number.
4. After verification, select Make primary if this should be the main number.
5. Optionally select Remove next to the old phone number to delete it.

Alternatively:

1. Sign in to the Microsoft account profile at https://account.live.com/names/manage.
2. Under Your info, choose Add phone number or select Remove next to the old number and then add the new one.

For a Microsoft 365 admin updating their own contact phone number (business subscription):

1. Go to the Microsoft 365 admin center (https://go.microsoft.com/fwlink/p/?linkid=2024339) and sign in.
2. Go to Users > Active users.
3. Select the admin account.
4. Under Contact information, select Manage contact information.
5. Update the phone number and select Save changes.

If the phone number is already associated with another Microsoft account and needs to be moved:

1. When the message "[phone number] is already a Microsoft account" appears, select Sign up or Transfer number (if shown) and follow the prompts to move it from the old account to the new one.
2. If the Transfer number option does not appear, select Change number and either use a different number or try again after 30 days.

References:

• Change the email address or phone number for your Microsoft account
• Update your Microsoft 365 admin phone number and email address
• Help with "phone number is already used" in a Microsoft account