tengo siempre un problema en la identificación y utlizo Mac

Hello, thank you for reaching out to Microsoft Q&A.

1. May I please know if you are able to sign in with your Microsoft account online here? https://account.microsoft.com/services *Are you using the email address for a personal Microsoft account (e.g., ending in @outlook.com, @hotmail.com, or @gmail.com) that you created for services like Skype or Xbox, or a work or school account provided by an organization (e.g., *****@company.com)?
2. What is the exact error message you receive when you sign in with your Microsoft account on Office applications?

Meanwhile, run the Office License Removal Tool to remove any previous traces of Office licenses installed on your Mac, then reactivate them.

Cómo quitar archivos de licencia de Office en un equipo Mac