Adding a frontend server to an existing environment


I've added a frontend server to an environment.  In Environment health, all is showing green exept "IIS" When i hover over IIS, I get "Error contacting Application, The operation has timed out"

I've configured the certs, bindinds etc the same as the other frontends

Is there something i'm missing or is there a time delay involved? All the ports seem open between lifetime, 


Version 10.0.1005.1

I'm assuming it is an on-premises installation.

I see two possibilities:

Is it in the same timezone?

Does the license accept that many servers?