Microsoft disables file opening in classic Teams app

Microsoft is disabling the ability to open files directly within the classic Teams app, pushing users toward the newer version before its July 1, 2025, end-of-availability date. This change, categorized as a "Major" one, aims to address recent security vulnerabilities. The feature removal, affecting Windows, Mac, and web versions of classic Teams, began rolling out on April 15, 2025, and will conclude by April 30, 2025. Users will now need to open files in their respective applications, like Word for .docx files, instead of within the classic Teams interface. This move is part of Microsoft's broader strategy to phase out classic Teams, which reached its end-of-support on July 1, 2024. The company has been actively encouraging users to migrate to the new Teams app.