Issue with Remote Desktop Licensing Manager on AWS Microsoft AD

Hey all, I am trying to setup Remote Desktop Licensing Manager on AWS but i am running into this error with the Manager "The system cannot determine if the license server is member of TSLS group on Active Directory Domain Services (AD DS) because the AD DS cannot be contacted."

Now I added the Instanced to the domain and then added the instance to the TSLS group in AD. for whatever reason I am stuck here. All ports are open that are needed. is there something in AWS managed AD that i need to change?