RemoteApp User Assignment not filtering for members of trusted domain

@Ruslan Nalivaika Please help me by sharing how you resolved the issue mentioned above, as we are facing the same scenario.
Users from the account forest, who are added to a domain local security group in the resource forest within Active Directory, are able to see all Remote Desktop Services (RDS) applications instead of only the applications explicitly assigned to them.

This is a newly configured setup, and the cx expected behavior has never functioned as intended for users from the resource forest. However, the same configuration works as expected for users from the local domain forest.

Is there any log that I can use to troubleshoot user assignment filtering ?

Hi Karlie, yes different customers/users are members of different AD groups used on collections...

Hello Ruslan @Ruslan Nalivaika

Please make sure you have added groups in Active Directory Users and Computers .

For example, you have Group A and B, each group has their own users.
Please add Group A and B as member of built-in group named Remote Desktop Users:
Active Directory Users and Computers – your domain name – Builtin - Remote Desktop Users – Properties – Members – Add, manually add Group A and B.

On your RD CB, open Server Manager – Remote Desktop Services – Collections:
Click to select one of your collection, for example Collection 1 – PROPERTIES – TASKS – Edit properties – User Group – manually add Group A, and remove domain user group. Make sure there is only group A added.

Save the change and check the result. Same operation for your collection 2 and group B.

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Best Regards
Karlie