Roster search for non-spark clients

I am running Openfire 3.10.2 with about 200 users. We have been using Spark for several years, but I have also used other clients myself. It seems that only Spark can search the roster. I have tried Jitsi, Xabber, and Bria. Is there a trick I am missing?

Maybe roster search is the wrong way to say it. Only Spark is able to search for users in Openfire.