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There you will find the "rlmhostid" application. You can copy it to the computer from which you want to know the "hostid". To To get the Id, a terminal application (e.g. Command Prompt, Bash,Terminal) is required. Use the "cd" command to browse to the directory where the program has been stored, for example under "Downloads"
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You will see a terminal message providing the required host Id - here a screenshot from Windows (the Id from the screenshot is just an example and does not represent the actual code):
