I set up a test IBM Domino 9.0.1 on Linux, configured the server with user with full admin rights, and was able to connect Note client application. When I tried to register a new user via the Web Administrator client, I got this message:
No Certificate Authority ('CA') configured certifier available for this domain.
The documentation says in order to register Notes users, one has to set up a server-based Certificate Authority(CA) and list both the Web administrator and its server as a registration authority(RA). How to set these up with Web Administrator client? Domino Server runs on Linux