The customer have none Exchange servers in their server enviroment. Now they want to install Exchange 2013 only for sending Sharepoint Workflow epost to AD mail enabled groups. I see no need for CAS role exept for : https://localhost/ecp
(works only on CAS server). Use of powershell to create send/receive connectors , transport rules, accepted domain should do, or is there something i missing without install CAS role. If I need CAS role in later future it is still possible install the CAS role on same server (Mailbox)?.