Merge branch 'patch-1' of https://github.com/noiri-hub/azure-docs into cbrule

Author: dlepow

articles/api-management/backends.md

@@ -263,7 +263,8 @@ Include a JSON snippet similar to the following in your ARM template for a backe
 
 ## Limitation
 
-For **Developer** and **Premium** tiers, an API Management instance deployed in an [internal virtual network](api-management-using-with-internal-vnet.md) can throw HTTP 500 `BackendConnectionFailure` errors when the gateway endpoint URL and backend URL are the same. If you encounter this limitation, follow the instructions in the [Self-Chained API Management request limitation in internal virtual network mode](https://techcommunity.microsoft.com/t5/azure-paas-blog/self-chained-apim-request-limitation-in-internal-virtual-network/ba-p/1940417) article in the Tech Community blog. 
+- For **Developer** and **Premium** tiers, an API Management instance deployed in an [internal virtual network](api-management-using-with-internal-vnet.md) can throw HTTP 500 `BackendConnectionFailure` errors when the gateway endpoint URL and backend URL are the same. If you encounter this limitation, follow the instructions in the [Self-Chained API Management request limitation in internal virtual network mode](https://techcommunity.microsoft.com/t5/azure-paas-blog/self-chained-apim-request-limitation-in-internal-virtual-network/ba-p/1940417) article in the Tech Community blog.
+- Currently, only one rule can be configured for the circuit breaker. If you set 2 or more rules under the "circuitBreaker.rules" in your ARM template, you will get "ValidationError" and fail to deploy it. 
 
 ## Related content