Merge pull request #211710 from Nagarjuna-Vipparthi/patch-3

Update how-to-test-private-endpoint.md

Author: prmerger-automator[bot]

articles/load-testing/how-to-test-private-endpoint.md

@@ -46,6 +46,7 @@ These resources are ephemeral and exist only for the duration of the load test r
 
 - An existing virtual network and a subnet to use with Azure Load Testing.
 - The virtual network must be in the same subscription and the same region as the Azure Load Testing resource.
+- You require the [Network Contributor](/azure/role-based-access-control/built-in-roles#network-contributor) role, or a parent of this role, on the virtual network. See [Check access for a user to Azure resources](/azure/role-based-access-control/check-access) to verify your permissions.
 - The subnet you use for Azure Load Testing must have enough unassigned IP addresses to accommodate the number of load test engines for your test. Learn more about [configuring your test for high-scale load](./how-to-high-scale-load.md).
 - The subnet shouldn't be delegated to any other Azure service. For example, it shouldn't be delegated to Azure Container Instances (ACI). Learn more about [subnet delegation](/azure/virtual-network/subnet-delegation-overview).
 - Azure CLI version 2.2.0 or later (if you're using CI/CD). Run `az --version` to find the version that's installed on your computer. If you need to install or upgrade the Azure CLI, see [How to install the Azure CLI](/cli/azure/install-azure-cli).