CUPS 7.0 adds the capability to support multiple LDAP search bases. To specify more than a single LDAP search context use # as a delimiter in the LDAP Search Context field on Cisco Unified Presence Administration.
An example of the supported format is:
ou=test,dc=example,dc=com#ou=testing,dc=example,dc=com
The Cisco Unified Personal Communicator will then search both Organizational Units in order, 'test' then 'testing'.
Additional design configuration can be found here:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/presence.html#wp1084996