Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi there.
Thanks for reaching out Microsoft Community.
To update your phone number for your school account, you will need to contact your school's IT department or support team. They should be able to assist you in updating your phone number or verifying your account through an alternative method. Let me know if you need further assistance with Microsoft 365 or Office related queries.
Best regards,
Oscar Calvo
Microsoft Community Support