When you select posting type for e.g. posting validation on a main account you cannot filter on the available posting types, but you have to find the correct type manually scrolling down and find it between the aproximately 200 available types.

The idea is the create the same filter functionality as we have around in D365FO (Begin with, Contains etc.).

Posting type is not only selected on a main account but also in other parts of D365FO e.g. auto charges.