Office sandbox file security to disappear from enterprise Windows by late 2027, Microsoft confirms – Computerworld

Full removal will happen for Office version 2612 by December 2026 for the Current Channel, February 2027 for the Monthly Enterprise Channel, and July 2027 for the Semi-Annual Enterprise Channel.

Ambiguously, the timeline also lists December 2027 as the final date for removal, although it’s likely that the later date is a final cut-off for customers with extended support licenses.

Isolation overhead

Instead of opening files in main memory, MDAG opens files in a Hyper-V sandbox, thereby isolating any malware executed from the operating system. The concept is sound, but it comes with the inconvenience of much slower document load times.