[Python] Cannot execute shell command on Microsoft IIS

When my Django application is hosted on IIS, this fragment of code doesn't work.

def convert_to_pdf(input_file, output_file):
wordfile = input_file
command = ["soffice", "--convert-to", "pdf", wordfile, "--outdir", os.path.dirname(output_file)]
subprocess.call(command, shell=True)


When I try to execute the command manually on cmd it works fine. Code

I've tried to grant all permissions to DefaultAppPool but nothing changes.

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