Microsoft Word: Similarity Checker retirement

🚨 The Signal: Microsoft Word's Similarity Checker, a tool for identifying content originality, will be retired on October 3, 2026. This change removes a built-in capability for basic content validation, requiring organisations to seek alternative solutions for formal similarity checks.

The Impact

Users who rely on Word's Similarity Checker are affected, with a low security risk as this feature is not a formal security control.

• End-users: Will lose a built-in tool for basic content originality checks.
• Organisations: Must find and integrate alternative solutions for formal similarity validation.
• Security Teams: No direct security impact, but awareness of the feature's retirement is prudent for policy alignment.

The Action

1. Review internal policies and workflows that currently leverage Microsoft Word's Similarity Checker.
2. Communicate the upcoming retirement of Similarity Checker to affected users and departments.
3. Evaluate and procure alternative third-party solutions for formal similarity or originality validation, if required by organisational policy.
4. Update internal documentation, training materials, and user guides to reflect the removal of Similarity Checker.

Domain: M365-Apps · Impact: low · Workload: M365 Apps