It won't show in a drug screen, they won't be testing for it.
Jack3d and the like that contained DMAA used to test positive but that's completely different to a prohormone.
A preworkout that contains AMP citrate would likely give similar results to DMAA.
It depends a lot on how far they do the testing with these. The instantaneous test will come up positive for amphetamines but when they further analyse it, it will show its not. It will also be out of your system within 24 hours of stopping use.
I have to do a lot of random testing for work and have never had a problem with ph's, only pwo's. But as said, not sure if it's worth risking it while on probation as its illegal just to have. I'd wait it out personally.