Jabber Guest is a Cisco product that integrates with VCS to do just what you are looking for:http://www.cisco.com/c/en/us/products/unified-communications/jabber-guest/index.html
No, the Jabber Guest SDK for iOS and Android doesn't support instant messaging. There is not a mobile SDK for Jabber that does, just one for the web: https://developer.cisco.com/site/jabber-websdk/overview/overview/Mike
You can manage Jabber Guest links using the Jabber Guest API:https://developer.cisco.com/site/jabber-guestsdk/documents/guest-server-api/Hopefully this helps meet the need some. Mike
