Endnote Web: How to change >2 author citaitons into ", et al."?

First up - I’m a complete Endnote newb, with only a few months under my belt. I use Endnote Web, which I log in to via my institution, and a plugin for Word (MS Office Home & Business Premium). The style my University uses is “BrookesHarvard”

Under my current settings any in-text citations I add end up as a list of author names, eg. (Smith, Bloggs and Johnson, 2020). But I’d like to make it so that it only lists authors upto a maximum of 2 names, afterwhich it would use “et al.”:

Current setting: 

(Smith, Bloggs and Johnson, 2020)

Desired setting:

2 authors: (Smith and Bloggs, 2020)

3+ authors  (Smith et al., 2020)

Thanks in advance

I see. That makes sense. At least I won’t be held accountable if my own institution is the one who manages the style!

Thanks