To add to Adam's response there is a .CMD file in the Knowledge->Command->Comand Store that you can issue too. You can technically create a clearing condition for multiple thresholds utilizing this in an analyst or a command line script. I do not have an example handy.. but this is what it does.
Destination: Control Threshold
Command: Ack problem #IRField0.#IRField1 analyst "#IRField2"
Destination: Automated Control Analyst
Command: stop problem #IRField0 . #IRField1 analyst #IRField2
If you also execute these from within an analyst there I believe some additional commands and options built into analyst syntax.
They both effectively do the same thing though for your purpose and its mostly a matter of syntax to the different destinations.
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Christopher R Souser - Solution Architect – MSci. PA, CISSP, ITIL.