As a reminder we look at all Exchange servers across an entire organization’s deployment as one organic entity that rely on each other for proper function. Microsoft still does not support configurations when Exchange servers have network port restrictions that interfere with or alter communications with other Exchange servers, Active Directory servers, or Lync servers, as the new article states up front in much more clear wordage than before, and because of this the document focuses on client connectivity and mail flow into and out of the Exchange organization.
We hope the new article is put to good use and welcome commentary if there are any scenarios you feel we left out.
Read more at source: http://blogs.technet.com/b/exchange/archive/2015/03/10/network-ports-for-clients-and-mail-flow-in-exchange-2013.aspx
Link to the TechNet Article: http://aka.ms/Exchange2013Ports