The Office 365 instance installed on a student’s laptop showed signs of not being activated and in need of an update. Clicking on any of the small buttons below the ribbon made no difference. Running Office updates manually from “File → Account → Update” gave us an error message: 30125-28 (404).
sfc /scannow with elevated rights managed to repair enough of the corruption to allow Office 365 to continue working.
Why are modern “cloud” software so fragile? Why are Dropbox and Google Drive far superior to the equivalent of Microsoft? Why is OneDrive for Business more on the order of OneDrive from Hell?