How can implement a "Legacy SSL" connection to connect to Cisco Jabber?
When I check the mechanisms allowed the server is returning "PLAIN","CISCO-VTG-TOKEN" and "OAUTHBEARER" and it will try only the PLAIN which actually is not allowed and the connection return "SASL authentication failed"

I found this place that explain something about Legacy SSL
https://github.com/RestComm/jain-slee.xmpp/blob/77cfa474c0e04a38f6f854837fbd7fcfd4e216f2/resources/xmpp/library/src/main/java/org/jivesoftware/smack/SSLXMPPConnection.java