Okay i got it. You have to append this file extension to the source file.
(vl-file-copy (strcat "\\path1\\" Data ".pdf - Verknüpfung.lnk")
Does anyone know if it is possible to make a PDF (without shortcut) from the source file that I move to another folder with vl-file-copy?
If I enter the file extension in the destination folder to ".pdf", the file is moved, but Adobe tells me when I open it that the PDF is corrupted.
In this case it would have to convert the .lnk file to .pdf.