If you open MS Outlook and see an error message, Outlook is using an old copy of your Outlook data file (.ost), then use these fixes.

If Outlook opens in a browser instead of the app, execute the solutions given below. Change the default app in Windows settings Set Outlook as the default client for all extensions Change the default ...

Is the classic Outlook email client crashing when you create or open a new email? If so, Microsoft suggests creating a new FORMS2 folder to fix the problem. Why Is Outlook Crashing On Starting or ...