Lync 2010 adding Edge server to existing topology

I'm planning on deploying an initial Edge Access server into my existing Lync 2010 environment.  I've already created the new topology and was confirming if publishing it would cause any issues with the current internal users/environment.  From my understanding, nothing will physically change until the Edge Access server is up and running the services and it should only affect outside users and not internal users.  thanks

Matt