Foundry agent is unable to connect to Search service with Private endpoint setup

Question

When we set up more than one private endpoint for different regions, the Foundry agent can’t connect to the Search service.

Getting below error:

ErrorAn error occurred while processing your request. You can retry your request, or contact us through an Azure support request at: https://go.microsoft.com/fwlink/?linkid=2213926 if the error persists. Please include the request ID 27b5b7c0-e6af-4602-bec2-4bd5e45c267b in your message.

Answer 1

Hi Surendra,

This is often related to Private DNS resolution rather than the private endpoint itself. If you're using multiple private endpoints across regions, verify that the Foundry agent resolves the Azure AI Search FQDN to the correct regional private endpoint IP and that the required Private DNS Zones (for example, privatelink.search.windows.net) are linked to the VNet hosting the agent. Microsoft also recommends validating DNS resolution from within the VNet using nslookup.

Also, verify that the Azure AI Search resource has its own private endpoint, as this isn't created automatically with Azure AI Foundry deployments, and ensure NSGs, UDRs, and firewall rules allow connectivity between the agent and the Search service. If DNS and networking are configured correctly and the issue persists, capture the Request ID, enable diagnostic logs, and open a Microsoft support case. This will help determine whether the problem is related to a service-side issue with multi-region private endpoint routing.

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