If the copyright or work or school account isn't working, see I forgot the username or password for the account I use with Office. Assign a license to a user directly in the Office 365 portal by selecting a check box on the licenses page for the user’s account. https://microsoftoffice2021profes42074.bloggazza.com/28169534/microsoft-office-lizenca-può-essere-divertente-per-chiunque