So... I chose the Update domain button, and then "Re-run LDAPSearch". I checked the processes running on the server and the python script to load the directory information was running. I then just let the process run overnight. It takes many hours. When I arrived at work in the morning, it was configured and the directory information populated.
I am facing this same issue. Unable to save SA-ldapsearch configuration despite of the connection status being successful.
Were you able to resolve this issue ? If yes, please share the workaround.