WHAT'S NEW IN DOMINO 12?
There are some internet certificate critical extensions that Domino does not support. By default, when you attempt to import an internet certificate that has one of these extensions that is tagged as critical, the import fails with the error Unable to parse certificate.
Use the notes.ini setting ALLOW_PARSE_OF_UNSUPPORTED_CRITICAL_EXTENSIONS=1 on a server or Notes client to allow these internet certificates to be imported.
Parent topic: New security features and enhancements