We have requirement to create availability dashboard for DNS servers based on region
Example: If we have 5 DNS servers available in GAR region then it should see in separate group or folder and in case more than 2 servers down in that region it should create alarm or notification
UIM 20.4 CU5
For separate group you can create separate dashboard for the different region.
Regarding the alarm notification more servers are down :-
This is out of box , Please check the triggers section in nas .Might need to create custom lua scripts.