Invalid Host Key, Unable to Reclaim the Host Role

Solution:

Beginning with Webex Business Suite (WBS) 40.0 the host key was removed from all email templates.

In October 2020 Cisco announced Host key rotation, to prevent unauthorized use of the host key, the host key for a meeting will now automatically renew when a meeting ends.
For more information on Host Key Rotation Announcements for the Cisco Webex Meetings Suite click here.