I have one query regarding Autodiscover.
In a coexisting 2007 and 2010 setup should the autodiscoverserviceinternaluri be set to https://mail.domain.com/autodiscover/autodiscover.xml for all cas servers or should the 2007 cas servers be set to https://legacy.domain.com/autodiscover/autodiscover.xml
I know we need to change it for OAB,EWS,OWA,ActiveSync and point it to https://legacy.domain.com/oab.... but not sure about Autodiscover internalURI?