Which two steps are needed to configure high availability in Cisco IM and presence? (choose two.)

Refer to the exhibit.

Cisco Unity Connection and Cisco Unified Communications Manager are integrated by using SCCP. The Voice Mail Ports are registered. Users report that calls fail when forwarded to voicemail. Which is a cause of the issue?

The external database used for the persistent chat feature has been running out of space, and users are having issues with persistent chat rooms and messages. which external database toll must be used in the cisco IM and presence server to fix this issue?

AN administrator must configure a federation between company A and company B using the SIP/simple protocol. What are the configuration items that are available?

An engineer is assisting a user who is reporting Jabber desk phone control issues. The user has two desk phones, but jabber controls only one of them. The user is mot given the option to select the second phone within the Jabber client. Everything else is functioning normally with Jabber and with both desk phones. Which action resolves this issue?