Hi, Is the external URL attribute for all the CAS components needed only for autodiscover of Outlook Anywhere services for non domain joined PCs with Outlook 2007? Thanks!

Hi, The external URL attribute is only for autodiscover of Outlook Anywhere. Mike

Yes, that's right Mike,the External URL in the EMC is the URL which should be the exactly same in the Outlook account "Connect through HTTP" option.make sure you type https instead of just http.hope that helps.

I disagree. CAS Redirection is used when the organization has multiple Exchange 2007 Client Access Servers, in different Active Directory sites, facing to the Internet with the ExternalURL attribute enabled.