In the mobile application of Microsoft Office product (Word, Excel, etc.), do the following: Doing this should cause the software to activate, and functionality should be restored from there, allowing you to edit documents per normal.You should do this even if you are 'already signed in' using those credentials.

When asked for login credentials, type in your full email address and UMICH (level-1) password.On the far right side of that banner, click the Use Another Account button.In order to restore functionality, try the following steps: In the desktop application of Microsoft Office product (Word, Excel, etc.), the error message will appear as a banner across the top of the application window. Note: U-M Office 365 licensing applies to activate student, staff, faculty, and sponsored affiliates, but does NOT include Alumni or Retirees. NOTE: Microsoft Office 365 now requires users to log in to activate and use the applications, whereas older versions of Microsoft Office do not. Learn more, contact your admin about your Office plan.' (The error message might be titled 'Ready to View Documents') To edit, use another account to activate Office. How to fix this error: 'Your account view documents, but it doesn't allow editing on a Mac. Microsoft Office, Microsoft Word, Microsoft Excel, Office 365 Issue

How to restore microsoft office on mac