Why would a Cisco Jabber contact under Hybrid Messaging Integration be grayed out?

The contact uses Cisco Webex Teams and Jabber and remains as Do not Disturb for 30 minutes.

The contact was using only Cisco Webex Teams and changed the status to Away.

The contact set Out of the Office for Cisco Webex Teams.

The other user has not used Cisco Webex Teams or Jabber within the last 72 hours, so they are offline.