I am trying to test a lab environment and would like to know is it possible to use a reverse proxy like IIS ARR to allow for a single external IP.

I have found that I can do it for lync without a reverse proxy so can I use it a reverse proxy for just the Exchange and Lync FE Server

http://blog.netnerds.net/2013/08/setup-a-fully-functional-lync-2013-lab-using-only-one-public-ip-address/

Ben

Hi

This solution will not be suited for actual environment.
Since you have mentioned that it is going to be  for lab setup you can perform this.

The answer is yes
You can use one public ip for lync and exchange services. There are multiple ways by which you can achieve this through TMG,KEMP etc..,
You can choose any one which you feel to explore in your lab
The only thing is the federation with the other entities will fail using 444,447 ports
You need to create wild card certificates for exchange, lync and import them on the reverse proxy solut