Also I have unsuccesfully tried to use Dropbox in a RDC running on Windows Server 2016. Well, I have found a trick, install dropbox in your RDC client computer, then, share your local drive in which the dropbox folder resides using the "local resources" tab on your RDC client. Connecto to your Remote Desktop. Now you can edit, copy, create, (etc..) files which reside in the dropbox folder of the previously shared drive, which will be syncronized by the Dropbox client installed on the RDC client computer.
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