Because the runtime is EOL, Microsoft will not issue a fix. The business is now stuck: upgrade the OS and lose the add-in, or keep the OS outdated and lose security compliance.
Many legacy enterprise applications rely on VSTO add-ins to automate tasks in Excel, Word, or Outlook. These add-ins often handle critical data processing, reporting, and integration between Office and third-party databases. When the underlying runtime reaches end of life, several risks emerge. visual studio 2010 tools for office runtime end of life
Many VSTO projects maintained backward compatibility and still rely on the 2010 Runtime redistributables or older architecture components. If your environment includes: Because the runtime is EOL, Microsoft will not issue a fix
The retirement of the VSTO runtime is part of Microsoft’s broader shift toward the . If your environment includes: The retirement of the
For years, VSTO was the standard for extending Office functionality. It allowed for deep integration with Office documents and the creation of custom task panes. However, technology moves fast, and the VSTO model has been superseded by more modern, web-based technologies.