MS Exchange 2013 server SMTP problem

Hi,

Don't know if anyone got this problem yet but I am currently testing a migration from Exchange 2010 to Exchange 2013 (in a lab) and I have a SMTP issue.

First I had one w2k8r2 domain controller and one w2k8r2 member with Exchange 2010 on it (with one valid domain and ssl certificate). No Edge Transport Server.

I recently added a Windows 2012 server and Exchange 2013 server in this lab domain and started migrating things to see if everything worked (I moved the SSL certificate, made the Exchange 2013 receive connectors active and also moved a mailbox).

However, there is one item that eludes me at this point: the new server can't send emails out (but it receives just fine).

On my send connector, I removed the Exchange 2010 server and added the new Exchange 2013 server instead (all other values remained the same).

Now when I try to send emails out with this new Exchange 2013 connector, I am getting a message that says (in the Exchange Queue Viewer): "A local loop was detected".

So I started looking at the problem deeper and found out that the transport role is not installed (mailbox, client access and management tools are installed).

How do I add the role?

Thanks.

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Benjilafouine