The approach there would be to make all 20 forums Private and explicitly allow access for that 1 forum.
That way you can strictly control which users and groups can access each of those 20 forums.
Paul,
I'm still having a hang over from assigning a few dozens members bespoke permission to some of our private forums. I have to do this a few times a year so trying to find a better way to do this.
Can you give me a better idea of what you are talking about?
I have one private category (CAT) with 20 private forums under it.
To get a member access to forum 1,2,3 under it, here is what I have to do
Under Node Permission, click on CAT, add that member with permission to view CAT
Go to forum 1, add that member and add permission to view, post, reply, etc
Go to 2,3 and do the same thing.
Now the member can see CAT on forum home with forum 1,2,3 under it. If I don't do the CAT step, they can only access it if they know the url.
Now I have to rinse and repeat this process for 40 other members. Can you imagine how cumbersome the process is?
Can't we just have a grid view where we can quickly check on boxes to grant them permission to nodes?