This is on Exchange 2010/2013 with Outlook 2010. CompanyA.com has merged with CompanyB.com to form NewCompany.com. Each company (A & B) has its own AD Forest, and its own separate Exchange server with its own users/mailboxes. These users now have a new default email address @NewCompany.com (that part has been configured fine). The problem is that Outlook tries to "autodiscover" the default email address (@NewCompany.com) and the mailboxes sit on two separate Exchange servers that know nothing about each other. Is there a way I can configure autodiscover so that users are "redirected" to the correct server? I do not want to user local XML files or do anything that requires changes to the client computers, I am looking for a solution that I can setup on the server side. Thanks!