The customer is unable to connect to z/OSMF after installing Zowe 3.0, they see messages IZUSVR is not registered or not online.
Component: Zowe API Mediation Layer
Reviewed the zowe.yaml file and found serviceId value of IZUSVR was incorrect.
Reference Gateway z/OSMF service configuration which shows the configuration yaml and states the service ID for gateway zosmf has changed to ibmzosmf.
Highly recommend upgrading to Zowe 3.1, for the z/OSMF related changes and various other fixes.