DO NOT share libraries via OneDrive. EndNote is not compatible with OneDrive. Saving and sharing via OneDrive can create a host of performance issues.
The Sharing feature is enabled by EndNote Sync. EndNote Sync synchronizes the desktop application to EndNote's online site. Using the Sync feature provides immediate and real-time access to libraries and groups. Libraries can be shared with up to 100 EndNote users. Groups can be shared with up to 1000 EndNote users.
EndNote Sync allows for sharing ONE library; users can identify the library by configuring their Sync preferences.
Library menu > Sync
File menu > Share…
Invite field: Enter email addresses
Permission field: Select permission level
Invite button > Close button
EndNote Sync allows for sharing Groups. A Group is a subset of references created by the user. Group Sets and Smart Groups cannot be shared.
Library menu > Sync
Right-click on the Group to be shared > Share Group…
Invite field: Enter email addresses
Permission field: Select permission level
Invite button > Close button
Users can save a complete library to a compressed file and send it to another EndNote user (using X or later versions). EndNote libraries larger than 4 gigabytes or 65,535 files cannot be compressed using the instructions outlined here.
File menu > Compressed Library (.enlx)…
Select Create & Email
Share with or without file attachments
Select all references, selected references, or a Group of references
Next button
Rename the file and select a location for saving (adding a date to the file name is recommended)
EndNote will generate an Outlook message > Enter the recipient's email address > Send button
EndNote users can create and share a file of references with other EndNote users.
Select the references to be shared (use the ctrl button to select multiple references)
File menu > Export…
File name: Name the file
Output style: RefMan (RIS) Export
Mark the "Export Selected References" box
Save button
Create a new email message and attach the file to it
EndNote can generate a .RIS file of references for import into other citation managers, like Zotero and Mendeley.
File menu > Export...
Select a location for saving and name the file
Save as type field: Text File (*.txt)
Output style field: RefMan (RIS) Export
Check the Export Selected References if sharing particular references
Save button
Share the file via email