Having issues with the RDStack Shortpath Error

Question

We are having issues with the Azure Shortpath error and network drops. Seems like we are configured correctly, but they still continue to show up.

Answer 1

Hi Nick Stultz

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

Please see the details below for more information.

Here the user session hosts, and the client’s public IP must be in Azure regions where ShortPath is supported. Ensuring the session hosts’ subnet has no UDRs blocking Microsoft-managed ShortPath service tags (AzureVirtualDesktopShortPath). ShortPath uses the Azure Virtual WAN infrastructure and Virtual WAN must have an AzureVirtualDesktopHub configured.

Allowing outbound UDP 4172 (RDP) and TCP 3389 to Internet and Virtual WAN prefixes. Also allowing outbound HTTPS 443 for control plan.

Also ensuring windows defender Firewall allows UDP 4172 and any custom ShortPath ports (e.g., 3391).

To verify DNS Resolution and MTU run:

1. nslookup rdp.shortpath.azure.com
2. ping rdp.shortpath.azure.com

In the Azure portal, under Virtual WAN → Hubs, verify the ShortPath status shows “Connected” and check health events.

Also ensure irtual WAN hubs are in two zones for resilience.

RDP Shortpath for Azure Virtual Desktop : https://learn.microsoft.com/en-us/azure/virtual-desktop/rdp-shortpath?tabs=managed-networks

For troubleshoot common Azure Virtual Desktop Agent issues https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-desktop/troubleshoot-agent

Kindly let us know if the suggested steps helps or you need further assistance on this issue.

Regards

Himanshu