OR (from VM console)
(Default password is sysadmin, unless you change it while configuring the engine)
Then follow the below steps:
delphixengineip > system restart
delphixengineip system restart *> commit
Restarting the management service. The current session will be re-established once the "service is available.
This step will try to restart Delphix management service which is in maintenanace mode.