It might also depend upon If you'd like assistance for an issue that has a support like OneDrive or Outlook.com, or assist with Windows, but you do not have an present Microsoft 365 membership. Your install is completed when you see the phrase, "You're all established! Office is installed now" https://install-microsoft-office09764.madmouseblog.com/7137294/getting-my-microsoft-office-2021-professional-plus-to-work