@john_strub
I don't know of any existing functionality in Excel for this.
But it could be done to some extent with VBA.
Here is a small approach in the inserted file.
Basically, it is a VBA code that shows the respective user (as logged in to Windows)
in the "Benutzer" sheet when he logged into this workbook.
I would be happy to know if I could help.
Nikolino
I know I don't know anything (Socrates)
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