Update metrics-not-emitted.md with RBAC notes

Added warnings and notes regarding Datadog integration and RBAC.

Author: v-albemi

support/azure/partner-solutions/datadog/metrics-not-emitted.md

@@ -50,11 +50,14 @@ Datadog requires the Monitoring Reader role on the appropriate Azure subscriptio
 
 1. Wait a few minutes for RBAC propagation, and then verify that Datadog is receiving metrics.
 
+> [!warning]
+> If you remove the system managed identity or the Monitoring Reader role assignment, the Datadog can't collect metrics from your Azure resources.
+
 > [!Note]
 > Confirm that the Datadog identity is the one used by the Datadog integration (managed identity vs. service principal). If you assign the role to the wrong principal, Datadog won't receive metrics.
 
 ## Related content
 
 - [Azure role-based access control (RBAC)](/azure/role-based-access-control/)
 - [Assign Azure roles using the Azure CLI](/azure/role-based-access-control/role-assignments-cli)
-- [Datadog Azure integration documentation](https://docs.datadoghq.com/integrations/azure/)
+- [Datadog Azure integration documentation](https://docs.datadoghq.com/integrations/azure/)