I would like to change the citation numbering format from 1. to (1). Does anyone know how to do this?
yes, – you would either edit the output style you are using – or find an output style that matches your needs. I assume you mean in the bibliography it self? – that is the Bibliography Layout and the setting you would edit is shown in the attached image. You would then “save as” to a new name and go back to your word document and change the output style you are using. I highly recommend that you do not name it the same name.
Far more than you probably want to know about ending styles is here:
http://endnote.com/sites/en/files/m/pdf/en-x7-win-editing-reference-types-styles.pdf
In Word’s Cite as you write, when you update citations and bibliography, the numbering system that corresponds to the citation is in order and looks like the image posted. I would like to change the 1. to a (1) in word.