IDoc Tunneling possible with IDoc_AAE Adapter?

Hi all,

I have a PI 7.4 AES system and wanted to know

1. If there's still such a concept as IDoc tunneling for the IDoc_AEE adapter?
2. And if so, can we set that as a parameter, maybe even on a per iFlow basis?

I want to avoid having a situation where a IDoc is just put through but gets really blown up volume wise because it uses IDoc tunneling (so happened at our old PI 7.0 Dual Stack installation).

Many thanks and kind regards

Jens