Authenication alert message

I just updated our jabber server from an earlier version of Jive Messenger to Wildfire 2.6.2. I’‘ve got it working so that authentication is happeneing against our Active Directory store. It’'s reading and populating groups exactly how I wanted.

However, since I made that change, when my users log in using any jabber client (tested against GAIM, iChat, Adium, and Trillian Pro) they get an alert message that says:

"Plaintext Authentication

This server requires plaintext authentication over an unencrypted connection. Allow this and continue authentication?"

Since we have our server inside our firewall, I don’'t want to require an encrypted connection. Is there a setting I can make that would disable this alert message from popping up everytime my users log in?