Exchange 2013 Server Roles Installation Order

We all know that we have only two server roles in Exchange Server 2013 and this is like front end and backend architect server role in Exchange Server 2003. In this post will discuss on which Exchange Server 2013 server role to be installed first.
In Exchange Server 2010 and 2007 installation, if it is a typical installation which will install the CAS, HUB & Mailbox server roles together on a single machine, then there is no need to look on the server roles installation order, but if we planned to deploy each role on a different servers, then Microsoft recommends to install the server roles in below order

1. Client Access Server Role
2. Hub Transport Server Role
3. Mailbox Server Role
4. Unified Messaging Server Role
5. Edge Transport Server

Lot of Architecture changes in Exchange Server 2013 which was released only with two server roles. Again if we are deploying both the server roles are on same server then there is no need to worry about which role to be installed first, but if we are separating server roles, then Microsoft recommends installing the roles in below order

1. Mailbox Server Role
2. Client Access Server Role

Also to have a proper functionality of Exchange Server 2013 both the server roles to be deployed in an Exchange Server organization and if we are deploying a Mailbox Server Role in an Actie Directory Site, then the Client Access Server role has to be deployed.

Posted in: Exchange Server 2013