EndNote Web allows you to share access with any other registered user. You can allow full read and write access or read only access. EndNote Web does not allow access to unregistered users, but most institutions that have access to Web of Science also have access to EndNote Web.
Sharing is done at the Group level. If you want to share your entire account, you must put all of your references in a group. The Unfiled group can not be shared.
You will need to know the email addresses that your collaborators used to register with EndNote Web.
To share a group: