You can share groups with colleagues easily in EndNote Online. Colleagues that have access to your shared groups will see them in their Groups Shared by Others section of the left navigation pane.  Below are instructions to share groups, unshare groups, and hide groups shared to you.

*EndNote X9 also allows you to share individual groups within your library without sharing the whole library from the Desktop version. People you are sharing with also need to have the software. See the video on the right for instructions on how to share Libraries.

• You can share with anyone using EndNote X7, X8, X9 or EndNote 20 (up to 100 people)
• Share your entire EndNote library, including references, PDFs, and annotations
  *EndNote X9 also allows you to share individual groups within your library without sharing the whole library.
• Everyone can add to, annotate and use the library – at the same time
• Review the activity of the changes your collaborators are making
• There’s no charge for sharing, no library size limit and no charge for unlimited cloud storage

To share your desktop EndNote library, you must first syncronize (sync) it with your Endnote online library. If you've already done this, then just go to File > Share and enter the email addresses of the people you want to collaborate with. If you haven’t, start by clicking the Sync icon on the toolbar. You will be prompted to enter your account credentials or create a new account, if you haven’t done so already. Once your account is created and your library is fully synced, you can begin sharing.

Sync times can vary depending on the size of your library. Be sure to check the Sync Status, located in the My Library panel, to make sure your library is fully synced before sharing.