I used the "create locator" GP tool in Pro 2.7 to create a locator. After it was created I modified the geocoding options to allow "match with no zones" and then published the locator to a stand-alone ArcGIS Server (v10.6.1). All that worked fairly well, except I still have to include a zone in the search criteria to get a match. For example, I can't just search "90 W Broad St". I have to search "90 W Broad St, Columbus, OH".
This is my first attempt creating and publishing a locator from Pro. I've always used ArcMap and had no problem with this. Anyone with a similar experience or advice?