endnote changing citations

I prepare my citations with a style such as (Smith, 2007) in text. But I live problem when I open MS word. Endnote is changing inside of some brackets which is not a citation. For example it’s changing from (RC) to (Doe et al., 2006). RC is an abbreviation here. I couldnt fix this problem.

it sounds like you may be trying to use a temporary citation delimiter as a conventional parethesis rather than the curley bracketed version, so it assumes all parenthetical items are citatoins.  You can check this in either your preferences (globally applied) or you can also change it in the format bilbiography menu.  It should not be ( ) but { }.