By default, the GroupWise Sync Agent communicates with the GroupWise POA using port 4500. If necessary, you can configure the GroupWise Sync Agent to use a different port.
In the Mobility Admin console, click Config, then click GroupWise to display the GroupWise Sync Agent Configuration page .
In the Port field, change the port number as needed.
(Conditional) If there is a firewall between the Mobility server and the POA server, make sure that the specified port is open.
Click Save to save the new setting(s).
Restart the Mobility Service:
gms restart