Верная ссылка
А там как обычно я в комментах вот с этим
https://docs.microsoft.com/en-us/archive/blogs/ehlro/how-does-autodiscover-service-retrieve-outlook-anywhere-clientauthenticationmethod-in-exchange-2010'But, actually that’s not what happens!
Autodiscover, on whichever server gets the request, it enumerates all the CAS in the AD site for values and then randomly choses one, and then returns it.
We should never assume that any one CAS only looks at itself for values to return to users, because we’ll be wrong. Following this logic, we should never think
that is possible to manipulate the flow in order to have predictable behavior.
Actually, we have in the CAS code the algorithm it uses to pick a certain URL.'
Как-то так)