Recently, I changed from JabRef to Endnote 7, and found that Endnote doesn’t offer an easy or straightforward way to sync its reference libraries via Dropbox. In fact, Endnote appears to discourage users from using Dropbox to sync their libraries (see here for example).
My workflow is as such: I store all articles (typically in pdf) in a Dropbox folder so that the files are synced across my desktops and laptops. I also need to sync my bibliography manager’s library file, so that when I add/remove articles (with file attachments and remarks) in the bibliography manager, the changes are applied to all terminals without extra intervention.
Step 1. Create a folder “Endnote” in Dropbox > References. (You can add the “Endnote” folder to whichever folder you use to store your references.)
Step 2. In Dropbox > References > Endnote, create three new folders: “Styles”, “Filters”, and “Connections”.
Step 3. Open Endnote 7. Go to File > New to create a new library “References” (or use any name that you like). Save this library in Dropbox > References > Endnote.
Step 4. In Endnote 7, go to Preferences > Folder Locations. Change the locations of folders for “Styles”, “Filters”, and “Connections” so that they points to the respective folders that have been created in Step 2.
Step 5. In Endnote 7, go to Preferences > URLs & Links, uncheck “Copy new file attachments to the default file attachment folder and create a relative link.”