Unfortunately no cadsmcmd command exists to evaluate a dynamic group.
A workaround is to put the evaluation frequency to 1, wait some minutes and put it again to higher value.
Example :
For dynamic group TEST_GROUP
cadsmcmd compgroup action=modify name=TEST_GROUP enginePeriod=1 enginename=systemengine
timeout /T 180 > nul 2>&1
cadsmcmd compgroup action=modify name=TEST_GROUP enginePeriod=1440 enginename=systemengine