DCO (Defense Connect Online). Client’ link to download & install. and select Start Chat. Jabber Messenger ‘Thin Client. DCO (Defense Connect Online). Anyone can download the latest version of the DCO XMPP. DCO XMPP Chat Client DCO Connect Desktop & Network Configuration Clients Servers. Chat / logs Mailing lists Membership Events Security Notices. XMPP powers emerging technologies like IoT. Once you are on your home page look at the left hand side under Instant Messaging. Click on Download XMPP Desktop Client. DCO XMPP Desktop Client by Jabber, Inc. Versions: 5.4. File name. DOWNLOAD. Jabber, Inc. 5.4. All versions. 5.4; 13 people Jul 24, 2015. Questions & answers (1) Wiki Defense Connect Online (DCO). DCO provides web conferencing. and the DCO XMPP chat client for presence and awareness. Jabber.org is the original IM service based on XMPP and. (or use one of the other fine public XMPP services). To log in, use an IM client like Adium, Gajim. Chat / logs Mailing lists. Any list of XMPP servers, clients or libraries will, due to the dynamic and evolving nature of the XMPP market. DOWNLOAD. Jabber, Inc. 5.4 All versions. 5.4;. Please visit the main page of DCO XMPP Desktop Client on Software Informer. SI comments Facebook comments. DISA discontinued the Defense Connect Online (DCO) collaboration service at the end of the DCO contract on June 24, 2015. The new collaboration tool.