Microsoft has confirmed a known issue that prevents recipients from opening encrypted emails in classic Outlook.

If Word, Excel, PowerPoint automatically reset settings on exit, follow these instructions e.g. check folder and Reigtsry ...

If Excel is not recognizing functions after reboot, change calculation settings, disable Show Formula, run Excel ...

You may receive the “Excel found unreadable content in filename.xlsx” error when opening the Excel file after updates. It often occurs when Excel fails to read ...