i think you are referring to the "custom contact" section; this is supported with jabber for windows 9.7 for on_prem setup; more information for the same can be viewed from the following link;
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/Windows/9_7/JABW_BK_CF8F083D_00_cisco-jabber-for-windows-97/JABW_BK_CF8F083D_00_cisco-jabber-for-windows-97_chapter_00.html#JABW_RF_N0C3239B_00
- Custom Contacts
Custom contacts are only supported in on-premises deployments.
Custom Contacts are contact entries for people who are not part of your organization's directory. You can create custom contacts a number of ways:
From File menu on the hub window From right-clicking an entry in the Call History or Voicemail tab and selecting Create custom contact
- Importing federated contacts
Custom contacts support up to six phone numbers or SIP URI addresses, which follow a user@domain.com format. Custom contacts can be created without an IM address or Jabber ID. After a custom contact is created, the value entered in the IM address field cannot be changed.
Custom contacts require no additional administrative configuration.
