A Microsoft file hosting and synchronization service.
Dear Michael Ann,
Thanks for your reply.
Sure, you could choose the account you want to use in Office applications,
Use your school account with license to active Office applications, sign in your own personal account and switch to that account, then you could save the file to your personal OneDrive with AutoSave on.
Thanks for your understanding and cooperation! Hope you keep safe and healthy always.
Sincerely,
Sean | Microsoft Community Moderator