I confirm that this is required. I also configured my OBi200 for auto provisioning as described. This caused 3.1.1 to be reinstalled every night which, of course, is the version with the old Google certificates. Try to make a call: "No service configured". Look on OBiTalk and there is a yellow triangle to re-install 3.2.1. Install that, everything is working again. Rinse-and-repeat until I set auto provisioning back to the OBiTalk defaults.