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When you try to print to the PDF24 printer on a terminal server session when the pdf24.exe is not running in your own windows session, the PDF is printed to the PDF24 printer in another user session on that server where pdf24.exe is running.
In our case, we run a script after a PDF print (open the file in adobe reader) and this is also happening in another user session.
So when you print to pdf in a terminal server session when pdf24.exe is not running, the PDF is printed and pops up at the screen of a random user on that same server (and on your own screen, nothing happens)
Stefan Ziegler Changed status to publish 2018-06-14