If the server itself is not reachable we will try the next server. You wont be able to add the server with an invalid hash and if you are able to do that then there is an issue. I assume you are asking if the hash changes and is now invalid? We should go down the list as ordered although I can not find this documented so that I can link you to it at this moment. If I come across it I will respond back.
AC & ATS TME
What is the expected behavior when multple Trusted Servers are defined? And what is the expected behavior if one or more of the defined servers is reachable, but has an invalid hash (changed since initially added). As you mention, I don't see this documented anywhere. Are we simply looking for a single Trusted Server that is both reachable and passes hash check? So we go down the list until those conditions are met for one defined server in the list? If you find this formally documented somewhere, please post the doc link. Thanks!