Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Haylan,
Thank you for reaching out.
Based on your description, it appears that your school’s Microsoft 365 installation requires a license or product key that has not yet been assigned to you. Please reach out to your school’s IT administrator and ask them to provide the key or activate Microsoft 365 Education for your school account.
Once the license has been assigned, you should be able to sign in with your school account and install or activate Office.
In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support
I hope the information I shared earlier was somewhat helpful in addressing your issue.