Alarm is creating for other server instead of real server cluster server

Document ID : KB000113251
Last Modified Date : 10/10/2018
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Some alarms show an incorrect hostname.  The robot name may be correct. 
However, the hostname is wrong.
UIM 8.51
nas probe version 9.0
Windows or Linux
The "nas" probe will try to use DNS, WINS, naming services to match the IP address listed in an alarm with a hostname.
nas probe name resolution
If DNS or WINS is not configured correctly, there may be cases where alarms will show an incorrect hostname.
In your "nas" configuration, under "Name Services" > "Properties" 
you have "Use Default Name-Resolution. DNS, WINS, etc..". 
You can deselect this, and leave "use NMS RobotName as Hostname (if available)" if you prefer to see the robot name in the alarm. 
Disable DNS WINS nas probe
So, the alarm will use the Robot Name for the Hostname on the alarm.