Hi, mrbnet!
Sorry I was wrong. Despite the OSPF routes already there, you have to put 'iroute' statement with net behind client's gateway in 'Client specific overrides - Advanced' on the server side for each client. It seems to be double work, but this is how OpenVPN works in 'Peer to Peer ( SSL/TLS)' mode.
I myself use OSPF for failover only and do not need to expose my home net to main office, so I do SNAT at home and 'Remote Access ( SSL/TLS + User Auth)' . Somehow it works without 'iroute' at the server side/