diff --git a/content/nim/waf-integration/configuration/_index.md b/content/nim/waf-integration/configuration/_index.md
index e863cf211..f1bb62655 100644
--- a/content/nim/waf-integration/configuration/_index.md
+++ b/content/nim/waf-integration/configuration/_index.md
@@ -40,4 +40,12 @@ This guide explains how to set up NGINX Instance Manager to manage your WAF conf
     {{<card title="Troubleshooting" titleUrl="troubleshooting/" >}}
     Resolve common issues with F5 WAF for NGINX and NGINX Instance Manager by verifying installation, configuration, and connectivity.
   {{</ card >}}
-{{</card-section>}}  
\ No newline at end of file
+{{</card-section>}}  
+
+
+## Limitations
+
+NGINX Instance Manager does not support the following F5 WAF for NGINX features:
+- [Policies with external references]({{< ref "/nap-waf/v4/configuration-guide/configuration.md#external-references" >}})
+- Custom signatures
+- A gRPC policy can be crated or edited in NGINX Instance Manager, but cannot be compiled.