You need to recommend a solution to ensure that during the planned migrations, all Autodiscover requests are processed by the Exchange Server 2013 Client Access servers.
What should you recommend?
A. On the Exchange Server 2007 Client Access servers, modify the AutodiscoverServiceInternalURI.
B. On the Exchange Server 2007 Client Access servers, modify the ExternalURL value of the Autodiscover virtual directory.
C. On the Exchange Server 2013 Client Access servers, modify the ExternalURL value of the Autodiscover virtual directory.
D. On the Exchange Server 2013 Client Access servers, modify the AutodiscoverServiceInternalURI.
