When you install EndNote, the Cite While You Write add-in will be inserted into your word processing software. Check the EndNote website for Windows and Mac Cite While you Write compatibility.
The bibliography should now appear at the end of the document. Position your cursor inside the reference and notice that it is shaded grey, as does the bibliography. This means that this text is linked to EndNote program, and contains EndNote Field Codes. Only edit these using the EndNote toolbar features in Word (see Editing & Managing Citations)