Manage Emergency contacts remotely
So i figured this out, and it was deceptively simple. It seems to be an 'undocumented' feature that if you set up a category within outlook with the name of ICE, it will automatically (at least on samsung phones) set contacts tagged with that category into the ICE group on the phone.

I ended up writing a script that ensures whoever has outlook gets the category, and then contacts tagged with that category.