reduced functionality

The tag reduced functionality on WindowsForum.com covers scenarios where software or operating systems lose full capabilities due to licensing, support expiration, or activation issues. Discussions include Microsoft Office and Microsoft 365 apps on macOS and iOS entering reduced functionality mode after July 13, 2026, unless updated with a renewed licensing certificate, affecting perpetual license users. Another thread addresses Windows Vista entering reduced functionality due to a potentially non-genuine product key, limiting system use. Common themes include licensing certificate expiration, lack of update paths, and activation problems leading to restricted features. The tag is relevant for users troubleshooting unexpected feature limitations in Microsoft products.