Exchange 2013 Licensing for DAG

Hi,

I have a single server with Exchange 2013 Enterprise license applied.  I have created two new servers on a newer OS that I have setup as a DAG.  Can I apply the same license to these new servers without running into issues? I will be decommissioning the old Exchange server once I have moved the mailboxes over.  The two new servers are currently running a trial version.

Thanks