I have been able to sync my desktop to my online endnote libraries in the past. However, for the past few weeks, I have been receiving a message: “Endnote could not connect to the online sync service. This may be due to a temporary Internet or Server error. Please try again.”
I too am having this problem, since last October. I have tried uninstalling/reinstalling Endnote on the computer that’s having trouble, resetting to default settings, deleting my login information from sync (and then readding it, of course), and several other things. Any help would be much appreciated!