The document on idocs was wonderful. What are the updates if any, in view of SAP S4/HANA system, though the question seems silly but with MES in particular?
Which document? And what kind of updates are you looking for? If it is my old one
There are a few differences with S4/HANA, but the help instructions are fairly clear and for the most part very similar to general ECC implementation.. I would keep the old document handy. I would also suggest keeping Troubleshoot issues with MII-ECC connectivity[IDoc] handy as well. Both are pretty old, but still useful.