Hi my name is ***** ***** I can assist. I don't believe that you can pull it from Dropbox since it is a application the attaches a cloud connection to your file system. You might try using a environment variable instead of a direct path. You could use %USERPROFILE%\AppData\Roaming\Microsoft\Templates\Email.oft and save the .oft file in the same spot. Every user that logs on, %USERPROFILE$ will be relative to them.
If you are on a domain, you could also use Group Policy to place the template in the user profile for everyone just using the same path with the environment variable.
Just checking in with you. Did the answer above help at all?