Our customer got a problem on Unity, the following is the background:
2 x UM with manual failover
Problem: when customer maintenance their Exchange server, Pri Unity fail contact with Exchange and the TSP port become out of service then pass to Sec Unity, Sec Unity fail to take the call and logging report that cannot failover on this situation.
Attach PNG for reference.
Finally both Unity cannot take the message.
I would like to know if config to Active-Standy Unity with manual failover, this situation is normal? when Pri Unity lost connection with Exchange the TSP port will out of service and pass to Sec Unity? Any configuration and avoid it?