You should be able to adjust the global setting in Word using the the steps from our website:
Additionally, if you are only seeing the codes being displayed for specific citations, this can often be caused by Tracking Changes in a document. To hide the field codes for a single citation that may be behaving this way Right Click on the specific citation in the document, or [Control]+Click on a Mac, and choose the “Toggle Field Code” option from the context menu. This will hide the field code, and display the formatted citation if the problem is affecting a single citation.