If you can't find the Altiris Agent tickle function in Workflow, this one is for you. For the uninitiated, the tickle function refers to the ability of the NS to instruct a managed computer to check-in immediately, as opposed to waiting for its next scheduled check-in interval. It's commonly used when you need a handful of computers to immediately perform an NS related activity such as installing software or applying a patch.
From the toolbox in Workflow Designer, use Altiris > Platform > Altiris Agent > Execute Power Management Cmd to target one or more computers by Guid.
Use Altiris > Platform > Altiris Agent > Execute Power Management on Collections to target one more collections of computers.
In either component, ensure the Configuration tab > Commands setting includes the Constant value of GetClientConfig (it's a checkbox, no need to memorize).