The dialback secret is basically a password, it can be anything.
To over simplify, the recieving XMPP verifies the identity of the connectinig server by comparing the dial back secret provided by the initial connection with the dialback secret provided by DNS lookup and return connection. If they match it is very likely the connection is from a legitmate server.
One thing I would complete your documentation with:
SRV xmpp for chat function with the following address:
CUP 8.6 > Messaging > Group Chat Server Alias Mapping > what you find here (eg.
conference-2-StandAloneCluster.example.com)
Getting Started
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: