We have a server running Exchange 2013 for just a few users and want to install 3CX on the same server. We don't need UMIP Gateway in Exchange 2013, but there doesn't seem to be a way to uninstall just the UM component. So we are trying to change the UMIPGateway listening ports for SIP and TLS from the default of TCP:5060, 5061 to TCP:5070, 5071 so that we can install 3CX IP PBX. We are following Technet article here: http://technet.microsoft.com/en-us/library/ee633457%28v=exchg.150%29.asp7x Using Exchange 2013 Shell and the Set-UMIPGateway cmdlet with the following command: Set-UMIPGateway -Identity servumip -Address 192.168.4.1 -Port 5070 WARNING: The command completed successfully but no settings of 'servumip' have been modified. So the command is successful but nothing is changed. When we check the Microsoft Exchange Unified Messaging Call Router service it is still listening on TCP 5060. In the meantime we can just set both UM services to disabled, but Exchange Health complains about this, so changing the ports to something that is not used would be better. Can someone please help? How do we change these ports in Exch 2013?