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hello, and thank you for looking.<br />
<br />
I am currently in the process of migrating from exchange 2007 to exchange 2013.<br />
I understand there are only 2 roles in 2013.<br />
<br />
currently have 2 2007 cas servers in NLB using F5 and a 2007 CCR.<br />
The plan is to migrate to a 2013 CAS array using the F5 and a 2 server mailbox role in a DAG.<br />
<br />
I understand that the mailbox role needs to be installed first so that basic administration can be completed.<br />
<br />
so my questions are :<br />
<br />
&nbsp;after I install the 1st mailbox server role do I install the first cas server next ? <br />
Or &nbsp;do I install the 2nd mailbox server and configure the DAG before configuring mail flow etc? <br />
<br />
Im jut not sure of the actual order. &nbsp;I was thinking install mailbox server 1st. , install a cas server, &nbsp;configure the send/receive connectors etc. on the first mailbox server. &nbsp;than install the 2nd cas server and configure the cas array. &nbsp;finally after owa/active sync/ mail flow is configured and working, create the additional databases and than install 2nd mailbox server and configure DAG.
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hello, and thank you for looking.

I am currently in the process of migrating from exchange 2007 to exchange 2013.
I understand there are only 2 roles in 2013.

currently have 2 2007 cas servers in NLB using F5 and a 2007 CCR.
The plan is to migrate to a 2013 CAS array using the F5 and a 2 server mailbox role in a DAG.

I understand that the mailbox role needs to be installed first so that basic administration can be completed.

so my questions are :

 after I install the 1st mailbox server role do I install the first cas server next ? 
Or  do I install the 2nd mailbox server and configure the DAG before configuring mail flow etc? 

Im jut not sure of the actual order.  I was thinking install mailbox server 1st. , install a cas server,  configure the send/receive connectors etc. on the first mailbox server.  than install the 2nd cas server and configure the cas array.  finally after owa/active sync/ mail flow is configured and working, create the additional databases and than install 2nd mailbox server and configure DAG.

Exchange 2007 to exchange 2013

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.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.