A collaboration engineer troubleshoots an Issue with Cisco IM and Presence federated with Microsoft Skype for Business. A Cisco Jabber user reports being unable to see the presence status of a user…

Question

Options

• ADisable TLS for the federation.
• BConfigure the federation to use the XMPP protocol.
• CAdd a static route on Cisco IM and Presence to the Skype for Business domain.
• DHave the Jabber user add the Skype for Business user to the Jabber contact list.

• A
  4% (1)
• B
  4% (1)
• C
  82% (23)
• D
  11% (3)

Explanation

For SIP-based federation between Cisco IM and Presence (CIMP) and Microsoft Skype for Business, CIMP must know how to route outbound SIP presence messages to the Skype for Business infrastructure. When DNS SRV records are not available or not used, CIMP cannot automatically resolve the destination. Adding a static route on CIMP pointing to the Skype for Business domain tells CIMP where to send federated SIP traffic for that domain. Without this route, outbound presence subscriptions to Skype for Business users fail silently from the Jabber user's perspective. Option A (disabling TLS) would reduce security and is not a resolution. Option B is incorrect because Skype for Business federation uses SIP, not XMPP. Option D does not resolve routing issues.

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