I've recently upgraded a system from 9.1 to 11.0.4 and there were issues with one-x mobile VOIP mode not working. Checked config to find SIP Registrar was not enabled. After attempting to enable it twice and trying both a timed reboot and when free reboot the system would come back with the SIP registrar still not enabled. The changes I made to the domain went through just not sure why the SIP Registrar would not stay enabled. Any one have any idea's?