Where can I configure logon permissions to a user group for Content Manager in Knowledge Center 2016?

Hi, 

 

I am trying to figure how to configure reviewer-only role for Create/Reach (aka Content Delivery). I created a new user group/ user role and test user. However, the test user is not allowed to log in. I guess I must configure permissions somewhere, but I can't find it the Content Manager UI. I would very much appreciate your help or a link to some doc about this option. Looked in official doc, but I only see the problem described without actually steps how to configure logon permissions.

 

Thank you!