Solution: Legacy_run mode means that the service is invoked outside of SMF (Default svr control for Solaris).
Before Suite 2015 (5.2.x), Centrify do need legacy startup method for Centrify SSHD service. Starting with Suite 2015, Centrify OpenSSH will be installed and set under the control of SMF (Service Management Facility) if it is enabled and running in the Solaris machines. Therefore user can view, set or control the Centrify SSHD service by the SMF tools, such as svcs, svccfg, etc.
As a result, the previous Legacy_run Centrify-SSH is leftover at the srv output. To resolve this, please feel free to kill the legacy_run SSHD service as there will not be any affect to end users' experience.