You complete a new installation of the Client Access server role on an Exchange Server 2007 computer named ExchCas1. An SSL certificate for ExchCas1 is issued to mail.contoso.com. Users will connect to their e-mail by using Outlook Anywhere with Microsoft Office Outlook 2007. You need to ensure that the Exchange Server 2007 Availability service is accessible from the Internet. Which cmdlet should you run?

A.
Set-WebServicesVirtualDirectory -Identity “ExchCas1\EWS (default web site)” -ExternalURL https://mail.contoso.com

B.
Set-WebServicesVirtualDirectory -Identity “ExchCas1\EWS (default web site)” -ExternalURL https://mail.contoso.com/EWS/Exchange.asmx

C.
Set-AutodiscoverVirtualDirectory -Identity “ExchCas1\autodiscover (default web site)” – ExternalURL https://mail.contoso.com

D.
Set-AutodiscoverVirtualDirectory -Identity “ExchCas1\EWS (default web site)” -ExternalURL “https://mail.contoso.com/EWS/Exchange.asmx”