Following are some links which will help you deploy CUPS in an XMPP
Federation. Depending on how familiar you are with CUPS, you may not
need to read the entire document. Search for federation or xmpp, should
get you to the most relevant parts.
Cisco Unified Communications System 8.x SRND
Cisco Unified Presence
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/presence.html
Integration Guide for Configuring Cisco Unified Presence Release 8.0 for
Interdomain Federation
http://www.cisco.com/en/US/docs/voice_ip_comm/cups/8_0/english/integration_notes/Federation/Federation.html
Cisco Unified Communications System 8.x SRND
Cisco Collaboration Clients and Applications
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/collabor.html
All of the CUPS documenation
http://www.cisco.com/en/US/products/ps6837/tsd_products_support_series_home.html
If you are still having issues please provide a link to a problem report. We may also need XCP logs.
Regards
Shane