dynamics-crm-2013,dynamics-crm-email-router
After waiting for some help I decided to answer my own question by installing the Email Router Versoin 2015 from here https://www.microsoft.com/en-us/download/details.aspx?id=45017 in a new server, I pointed one of the profiles to CRM 2013 and the result was: "Incoming Status: Failure -The Email Router service that is installed is...
dynamics-crm,dynamics-crm-2013,dynamics-crm-email-router
Yes, "Test & Enable Mailbox" in the mailbox is only to test and see if the Server Side sync is functioning correctly.