Small client, running Exchange Server on SBS 2011 as only DC. Wants to upgrade to 2012R2, adding a Web Server application that also requires SQL server 2012. Thinking about 2012 Essentials as DC and 2012 R2 Standard (Hyper-V with 2 VM's). Is there a problem putting the Exchange 2013 server and SQL Server 2012 on one server (2012 R2 VM) and the web server on the other? Do not anticipate heavy activity on any. Does not appear that the 25 user limit will be a problem for the DC. All assumes adequate hardware.
Thanks,
Lou