update limitation based on fb

content/en/real_user_monitoring/browser/setup/server.md

@@ -29,8 +29,7 @@ The available functionality has the following important limitations:
 
 - If proxying compressed traffic, the Auto-Instrumentation method is not able to inject the JS scriptlet into the HTML traffic.
 - This instrumentation method does not support any [advanced RUM configurations][3]. However, `allowedTracingUrls` and `excludedActivityUrls` are supported for NGINX web servers.
-- Auto-Instrumentation does not inject into encrypted requests served by NGINX or IIS related to TLS.
-- (NGINX only) Auto-Instrumentation does not inject encrypted requests served by the NGINX web server.
+- If NGINX or IIS is acting as a proxy and the upstream server has end-to-end encryption (like TLS) enabled, the module can not inject RUM. Ensure the web server is set up for TLS origination for successful instrumentation.
 - (Windows IIS only) Configuration for Auto-Instrumentation is only available per Windows IIS site.
 
 ## Prerequisites