Log Analytics Reverse Proxy Question

We have a webserver behind a Reverse Proxy and the log is showing the Server IP instead of the actual client. We have added the x-forwarded-for IP to the log. For right now this is the only server behind this proxy. I see Faq #98 How do I configure Piwik when the server is installed behind a proxy? FAQ - Analytics Platform - Matomo. The question I have is about all my others web servers. Since they are not behind the Reverse Proxy will adding this to the config break the Imports of the logs with the Correct Client IP?