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Duo for Microsoft RD Web and RD Gateway - Release Notes

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Duo for Remote Desktop Web

Version 3.1.0 - May 29, 2025

  • Adds support for new Duo certificate authorities.
  • Adds the new Duo Secret Key Rotation tool in the RD Web installation directory to assist administrators with updating the application's Client_Secret to a new value when required.
  • The Client_Secret is encrypted in the Windows registry. Previously, the Client_Secret was saved as clear text in the registry.
  • Supports Windows Server 2025.

Version 3.0.0 - January 29, 2024

  • Duo Universal Prompt support with OIDC standards-based redirects. The Duo Prompt no longer loads in an iframe. Learn more about the move to frameless authentication in preparation for Duo Universal Prompt.
  • The installer now defaults to "fail closed" for new installations and upgrades to v3.0.0. Upgrades from v3.0.0 to future releases will preserve the installed fail mode selection.
  • TLS 1.2 is now the minimum supported version. Drops support for TLS 1.1, 1.0, and SSLv3.
  • Fixes an issue with IIS proxy bypass parsing.
  • Corrects an issue with usernames using an alternative UPN suffix.
  • We now use enhanced strong naming for Duo generated .NET Assemblies.
  • Changes the registry values IKey and SKey to Client_Id and Client_Secret.

Version 2.3.0 - April 11, 2018

  • Support for UPN usernames.
  • Windows 2012 and later installations now require .NET Framework 4.5 and ASP.NET 4.5.
  • TLS 1.1 and 1.2 support for Windows 2012 and later.

Version 2.2.1 - October 2, 2017

  • Duo Web SDK 2.6.

Version 2.2.0 - August 2016

  • Deprecated installation of unified authentication.
  • Supports Windows Server 2016.

Version 2.1.2 - June 2016

  • Fixed unified authentication installer issue for localized Windows server editions.

Version 2.1.1 - January 2016

  • Improved user lookup and RDS host resolution.

Version 2.1.0 - Aug 2015

  • Windows 2012 and 2012 R2 support.
  • Introduces new "Unified Authentication" mode.
  • Changes the Duo RD Web registry key location to HKLM\Software\Duo Security\DuoRdweb.

Version 1.1.2 - Feb 2014

  • Fixed several installer issues.
  • Improved handling of redirects to Duo login form.

Version 1.0.2 - Oct 2013

  • Initial Release.

Duo for Remote Desktop Gateway

Version 3.0.0 - May 4, 2026

  • Adds certificate pinning support to enhance security of the connection between the Duo RD Gateway client and Duo's cloud service. Enable after installation in the registry if desired.
  • Adds duplicate push suppression for a default period of 30 seconds for the same user and computer.
  • Adds log file rotation.
  • Updates proxy handling logic.
  • Fixes uninstall timeout issue.

Version 2.3.1 - March 24, 2025

  • Adds the new Duo Secret Key Rotation tool in the RD Gateway installation directory to assist administrators with updating the application's SKey to a new value when required.
  • The SKey is encrypted in the Windows registry. Previously, the SKey was saved as clear text in the registry.
  • Security fixes.
  • Bug fixes.
  • Supports Windows Server 2025.

Version 2.3.0 - April 11, 2018

  • Support for UPN usernames.
  • Windows 2012 and later installations now require .NET Framework 4.5 and ASP.NET 4.5.
  • TLS 1.1 and 1.2 support for Windows 2012 and later.

Version 2.2.0 - August 2016

  • Deprecated installation of unified authentication.
  • Supports Windows Server 2016.

Version 2.1.0.12 - Aug 2015

  • Introduces new "Unified Authentication" mode.
  • Configurable idle and session timeouts.

Version 2.0.2 - June 2014

  • Converted to Microsoft pluggable authentication.
  • Changes the Duo RD Gateway registry key location to HKLM\Software\Duo Security\DuoTsg.

Version 1.0.2 - Oct 2013

  • Initial Release.