How to change security phone number for a user in microsoft admin?

Hello Ali Najarro,

Thank you for posting in Q&A forum.

Do you mean you want to update the phone number in Microsoft 365 Admin Center?

If it is the case, you could update in the Manage Contract Information sheet.

Here is the link for your reference:

Update your admin phone number and email address - Microsoft 365 admin | Microsoft Learn

I hope the information above is helpful.

If you have any questions or concerns, please feel free to let us know.

Best Regards,

Daisy Zhou

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