Here is are the quick steps to update your Exchange 2010 environment after you install our CAS 2013
- Update your CAS 2010 ECP/OWA VDIR Authentication to Windows Authentication
- Change your CAS 2013 ECP/OWA VDIR Authentication to Basic Authentication
- Install your SSL Certificates in your CAS 2013 servers
- Update TMG Server Farm to point to your new CAS 2013 servers
- Update your internal DNS records for your Urls to point to CAS 2013. Ex. mail.domain.com , autodiscover.domain.com