Hi, when I start the ssl-demo I can find the following in the log file: ssl.exe: 00004214: 16:00:27 [Indy]:EIdOSSLUnderlyingCryptoError : Error accepting connection with SSL. error:14094416:SSL routines:ssl3_read_bytes:sslv3 alert certificate unknown : Addr: $00776FDF   The application seems to run. I have the same problem with my own application What can be the problem? Best regards.