Yes, normally. But this time, there's no any detail in Polycom's manual or maybe I didn't find the right one. Here's some sample event from server.log.
020-03-10T12:00:04.647+0800|DEBUG|RegistrationMgr-ScheduledTasks:3552:|347|com.polycom.proximo.callserver.registration.RegistrationsMgr| Removed HighAvailabilityRegistrationKey commObject=3d1d6e75-f200-46c1-80bb-962a0ba8c771
2020-03-10T12:00:04.647+0800|DEBUG|RegistrationMgr-ScheduledTasks:3552:|347|com.polycom.proximo.callserver.registration.ManagedRegistrationImpl| cancel all timer tasks for registration:com.polycom.proximo.callserver.registration.H323ManagedRegistration@c96e659b:commObject ID[3d1d6e75-f200-46c1-80bb-962a0ba8c771] expireTask[com.polycom.rpp.commons.util.RppScheduledExecutor@5dd9c0de[Running, pool size = 1, active threads = 1, queued tasks = 270, completed tasks = 37689]] expireTasks[{}] idKey[3d1d6e75-f200-46c1-80bb-962a0ba8c771] lastContact[null] lastContactExpires[null] expiredReg[true] responseTerritory[PN:DMA:TER-A] rasAddress[/99.46.23.40:1719] allow LRRQ[true] remoteAddress[/99.46.23.40:1719]
2020-03-10T12:00:04.647+0800|DEBUG|RegistrationMgr-ScheduledTasks:3552:|347|com.polycom.proximo.callserver.registration.RegistrationsMgr| removed registration:3d1d6e75-f200-46c1-80bb-962a0ba8c771 because:UNREGISTERED key:3d1d6e75-f200-46c1-80bb-962a0ba8c771
2020-03-10T12:00:04.647+0800|DEBUG|RegistrationMgr-ScheduledTasks:3552:|347|com.polycom.proximo.callserver.registration.RegistrationsMgr| registration[com.polycom.proximo.callserver.registration.H323ManagedRegistration@c96e659b:commObject ID[3d1d6e75-f200-46c1-80bb-962a0ba8c771] expireTask[com.polycom.rpp.commons.util.RppScheduledExecutor@5dd9c0de[Running, pool size = 1, active threads = 1, queued tasks = 270, completed tasks = 37689]] expireTasks[{}] idKey[3d1d6e75-f200-46c1-80bb-962a0ba8c771] lastContact[null] lastContactExpires[null] expiredReg[true] responseTerritory[PN:DMA:TER-A] rasAddress[/99.46.23.40:1719] allow LRRQ[true] remoteAddress[/99.46.23.40:1719]] deactivate notify watcher:com.polycom.proximo.callserver.registration.GatekeeperRegistrationPolicyImpl@576af8c5
2020-03-10T12:00:04.647+0800|WARN |MsMonSup-Poll-MCU-99.38.80.100-ScheduledTasks:8480:|347|com.polycom.proximo.videoms.driver.util.XmlMcuExecutorBase| slow response 1013ms from 99.38.80.100 0Status OK
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