I want to create a 2 CAS Array setup, each with a seperat outlook Anywhere, owa, active sync but within the same exchange organization. Is this possible. ? (2 Certificat principal names) Installing the enviroment, and getting the CAS arrays up and running and functional is done, and working. on CAS-A outlook anywhere is working like it should. my issue is how to configure the Outlook anywhere part on CAS-B, in regards of certificat principal name. Set-OutlookProvider -CertPrincipalName msstd: i would like to use 2 certificates one to each CAS Array, to save cost. can you register 2 Certificat principal names, or does the certificat's common name, have to be the same for both certificats, for it to work. ? The setup: -One Exchange Organization -2 Active Directory Sites, with different networks/subnet but they are connected. (same AD) -Data Centre A has CAS-A. -Data Centre B has CAS-B. -each cas array is assigned to his own DAG -each cas array is in its on site. -each cas array is connected to it's own Internet Access/DMZ via TMG.

can you register 2 Certificat principal names, or does the certificat's common name, have to be the same for both certificats, for it to work. ? If two CAS array resided in different AD sites, then yes we may have different principal names to match it's external urls. Fiona Liao TechNet Community Support