EndNote does not perform record-locking functions that would allow multiple users to edit one library at the same time. However, multiple users can access one EndNote library simultaneously as long as the library is restricted to read-only or locked status. This will allow users to perform searches, copy information to their documents, and format their papers. Use Windows Explorer to change the Properties of your EndNote library; select the Read-Only attribute for the .ENL file and the .DATA folder.
The simplest way to set up an EndNote library for shared network access is to use the network’s system of file permissions to control the type of access allowed for users and groups. Except for the person who posts the database, grant all users read-only access.
One person should be assigned the responsibility for maintaining and updating the library at a separate location. This user should be granted full access to the file and should periodically post the updated library on the network for all other users, with read-only access.
Note: A quick way of making your library "read-only" is to select it in the Finder. From the File menu, select Get Info, and then click the "Locked" check box. When it is locked, multiple people can browse the file, but no one can edit it.