If during the Sync process, EndNote receives a group from EndNote online that does not belong to any group set up in EndNote desktop, then the system automatically adds the group to an Unfiled Group folder.
You should move all groups from the Unfiled Groups folder to an existing group set in EndNote. If an appropriate group set does not currently exist, then you should create one. EndNote removes the Unfiled Groups folder from the Groups panel when you move all unfiled groups to a group set.
If you are member of ResearcherID, then the groups named My Publication List, Publication List 1, and Publication List 2 will appear in Unfiled Groups folder following the Sync process. We recommend that you create a group set named ResearcherID and move these three groups into the group set. Note that any changes (or deletions) that you make to the references in these ResearcherID groups will be sent to EndNote online upon the next Sync and will also be seen at ResearcherID.com.