While these patches keep your server secure, TFS 2015 is now several generations behind. Microsoft now brands the platform as Azure DevOps Server, with the 2022 and 2024 versions offering massive improvements in pipelines, YAML support, and Git integration.

Make sure you have the credentials for the TFS service accounts, as the Upgrade Wizard will likely need to be run after the file installation. How to Install Extract: Unzip the contents of TFS-Update_4a-pc.zip .

Check your Microsoft.TeamFoundation.Framework.Server.dll version in the Application Tier\Web Services\bin folder to confirm your current patch level.

Security First: Managing the TFS 2015 Update 4 Patch (TFS-Update_4a-pc.zip)