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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 : <a href="https://localhost/ecp" rel="ugc">https://localhost/ecp</a>&nbsp;(works only on CAS server). Use of powershell &nbsp;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 &nbsp;role on same server (Mailbox)?.
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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)?.

No need for CAS role when only sending Sharepoint Workflow epost to AD mail enabled groups.

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.