Cool! I'm glad to hear that the def query is being used to the fullest extent. I guess the next question would be if it can be used as a geocoding service that is published. I'm guessing that it can, which will work for two of our data consumption users, but not the other - however, they are on an older version of ArcGIS Server and we have to write the data to their SDE anyway, so FME to to the rescue! I will definitely check out the locators in ArcPro (using 2.8.x right now)!
And since we are moving our addresses to ArcPro with Attribute Rules, we will have to be using ArcPro in the future for this layer.
Thanks,
Lorinda