Use the Application tab in Word to indicate which version of EndNote to use when you use Cite While You Write.
EndNote is your desktop version of EndNote bibliographic application.
EndNote online is the online Web version of EndNote.
To select the appropriate application:
From Word’s Tools EndNote menu, select Cite While You Write Preferences. On the EndNote tab in Word, select Preferences.
Click the Application tab.
Select the appropriate application: EndNote desktop or EndNote online.
The system adds an EndNote tab in the Tabs group in Word when you select the EndNote menu option. The system adds an EndNote tab when you select the EndNote online menu option.