Adding group from trusted domain into local domain

Question

HI,

I've setup a domain trust between 2 domains, A and B.

Domain A has all the corporate user accounts and groups
Domain B is an edge domain providing VPN services.

I've set up the trust and validated and all is passing the tests.

Domain B is configured with an Outgoing trust, Domain A with the incoming trust.

I'm trying to add a group from Domain A into Domain B to give access to the VPN services, however I can't seem to see or manually enter the Domain A group into Domain B group.

I've tried various combinations of domain local and universal groups but not having any luck. I expected to see the 2 domains listed in "Locations" when adding members to the group but I'm not seeing it. Also adding the group manually (groupname@keyman .local) also fails.

What am I doing wrong?