You can override all thresholds for nworks from the Authoring section of Ops Mgr console
However - the TARGET for these Monitors is not a Windows server (or application). It is our own custom nworks MP objects.
Here is how to find them -
* Go to Authoring section of Ops Mgr Console
* Select Monitors
* Clear any 'Scope' at top of window
* search for "nworks" in the Look For box
Now you see all nworks objects - 'COS Partition', 'DataStore', ' CPUs' and so on.
To find the Monitor you mentioned - VM Balloon Memory - scroll down until you find Target "vRAM".
Under -Performance is the Monitor "nworks VMware: VM Balloon Memory Usage has exceeded threshold"
You can right -click and create an override for this in the usual way.
Note - same applies for Rules, you can override them too.
There is a list in Ops Mgr Operations Guide of all the nworks Target objects, for Hosts, VMs, Clusters etc.
Hope that helps! Any queries let me know,