Azure AD Application Proxy - Remote Desktop Services (RDS) RDP UDP Support

Occasional Contributor

A client uses an AAD app proxy to publish RDS and followed these Microsoft docs to set everything up ... https://docs.microsoft.com/en-us/azure/active-directory/app-proxy/application-proxy-integrate-with-r...

 

Users authenticate against the remote desktop gateway to then access VMs that are hosted on-prem. Users now report that RDP sessions are somewhat slow and laggy with the sessions freezing every 10-20s for 1-2s.

We've checked the entire environment and found out that RDP sessions are using UDP 3391 but TCP 443.

 

There seems to be a limitation with the app proxy being unable to support UDP as first noticed in 2017 (https://social.technet.microsoft.com/Forums/windows/en-US/800bbe5e-afbc-46ed-bdb9-9e3f942337c7/perfo...), then again in 2019 (https://social.technet.microsoft.com/Forums/en-US/8dd34139-9aa2-4339-8aed-1c6e645b5766/rds2019-azure...) and again in 2022 (https://feedback.azure.com/d365community/idea/f3a05c53-853d-ec11-a819-000d3ae2b5ca).

 

Can someone comfirm this? Is there an update from Microsoft on when the app proxy might support UDP?

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