M365 - How to re -install Office applications
If You have complex problems with O365 you can fully reinstall Office 365:
Start from repairing Office 365, link below:
https://helpdesk.volue.com/support/solutions/articles/54000040889
Office365 include Office Apps
- Logout user from Word or any other office app:

- Remove all Office related passwords:
Control Panel\All Control Panel Items\Credential Manager

If still fail, start process again, and additionally:
- Uninstall Office365 - Microsoft 365

- Clear Office 365 - Microsoft 365
https://support.office.com/en-us/article/uninstall-office-from-a-pc-9dd49b83-264a-477a-8fcc-2fdf5dbf61d8
- Reboot andd install again Office 365 - Microsoft 365
Check FAQ, if you are missing Office 365
https://helpdesk.volue.com/support/solutions/articles/54000040890