One RDS Gateway, Multi RD Session Host on Different Domains

[TJ-Diggers]

So I have 6 schools of which 5 still have admin and curriculum networks.

 

I’m looking to build one RDS gateway for a school and then have an RD Session Host on both admin and curriculum. Moving forward I would like one RD Gateway for the MAT and then just RD Session host on each domain.

 

I’m assuming you just need a two way trust between and them to login and then add users from both domain to the session collections?

 

Anyone setup something similar? And if you have documentation your willing to share... that would be great!