Synthetic backups / scheduling of backups

I've recently setup new synthetic policies. They haven't run yet; currently deactivated. From what I understand about the scheduling of full backups, these policies first require a non-synthetic full and incremental to run prior to the synthetic full.

This leads to my question. How do I make sure that the first time the policies run, that my non-synthetic full and incrmental backups run prior to the synthetic fulls for all the client in the policies ?