Thursday, February 12, 2026

Troubleshooting MSBuild Assembly Issues When Migrating Azure DevOps Pipelines from Windows-2019 to Windows-2022

A team encountered a failure in our Azure DevOps build pipeline when using the Microsoft-hosted agent windows-2019. The pipeline suddenly started failing with errors indicating that the configuration was no longer supported. This happens because Microsoft has deprecated the windows-2019 hosted agents, making them unavailable for new builds.