Our company upgraded today to Openfire 4.1.1
Everything went smooth, except, for some reason, the upgrade replaced the sasl.mechs server property with only GSSAPI (SSO)
I had to add: GSSAPI, NTLM, PLAIN so other clients could logon to the xmpp server.
Spark client reported ‘invalid user’ as error message and in the error log message: org.jivesoftware.smack.SmackException: SASL Authentication failed. No known authentication mechanisims.
Thought i should let everyone known of this “issue” / “bug”