ST rolled out contact book and then pulled it pretty quickly. So if you got it during their roll out you got to keep it. Some people have figured out a back door to get it. Be warned if you enable it, you lose hub offline notifications.
ST rolled out contact book and then pulled it pretty quickly. So if you got it during their roll out you got to keep it. Some people have figured out a back door to get it. Be warned if you enable it, you lose hub offline notifications.