Currently, we have a SP 13 environment that has 2 WFEs, both licensed for Nintex, handling all web requests, from both users and CSOM calls. We are looking to add 2 more WFEs that through the use of request management throttling rules will exclusively handle only CSOM calls. User and Nintex-based requests will still be routed through the original WFEs. The new WFEs will handle NO Nintex-related calls. However, if I add 2 more WFEs that are running Foundation Web Service on them that will only be utilized when request management throttling rules direct requests to them Nintex Workflows and Forms will start posting errors that there are 'Invalid servers' or server not licensed errors. I understand that this is because we only have licenses for the original 2 WFEs.
So after a lengthy preamble, here's the question: how can I add 2 new WFEs to our farm which will only be used to handle CSOM calls and will NEVER handle Nintex requests without having to purchase additional licenses? Not trying to be cheap or "get away with something" just don't see why licenses need to be purchased for the new WFEs if they are only going to be used when request management passes calls to them.
Any help or advice would be greatly appreciated.
However, I don't think the org would agree to doubling our number of Nintex licenses either.