This guide is to follow if you have installed and uninstalled Outlook Office 365 package incorrectly, showing precisely the error of the missing .pst file
The procedure is very simple, after the window of this error:
Outlook will ask for the path to where the file is located that may have been moved. If we have the file somewhere we indicate it, otherwise I solved the problem by simply creating a new empty file with the extension .pst and Outlook has accepted it without problems.
In my case it was enough to create a new empty file without having a previous one. I tried to uninstall the Office 365 package several times, even with RevoUninstaller. I have not used Microsoft repair programs offered
Let us know if you have solved the problem!