I am going to piggy back on this thread as its something I'm looking into myself. We have similar setup 2x proxy servers NLB and 2xADFS servers but SQL instance holding the artefact database. This is all in one site and we want to add some DR to this setup.
So we are building out a DR site with 1xproxy server and 1xadfs server and a SQL instance that is a mirror of the databases.
In the case of the first site going down how do we move to the DR instance? I'm guessing that ADFS has a Database connection string somewhere more than likely encrypted.
Is there documentation for this type of scenario anywhere ?