MWPRO IMPACT SCORE
OPERATIONAL IMPACT
52
0
25
50
75
100
HIGH IMPACT • REVIEW RECOMMENDED
Recommended Action:
Review the update and plan any required actions before rollout.
Review the update and plan any required actions before rollout.
What is MWPro Impact Score?
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Primary Audience
Microsoft 365 AdminsTenant AdminsIT ManagersService Owners
Why this score?
AI Confidence
HIGH
Enough detail is available to trust this assessment.
Assessment Reasoning
Similarity Checker in Word will be retired on 3 October 2026. Admins need to identify existing use, inform stakeholders, and evaluate alternatives for plagiarism or originality checks. Users relying on Similarity Checker will lose this feature, but other editing tools remain available. Effort is moderate due to communication, workflow review, and any documentation updates.
55
Admin Impact
35
User Impact
60
Urgency
50
Effort
WHAT YOU NEED TO KNOW
AT A GLANCE
Similarity Checker in Word will be retired on 3 October 2026. Users will lose access, so review any dependent workflows and plan alternatives if needed.
END USERS
Users will no longer see Similarity Checker in Word after 3 October 2026.
IT ADMINS
Review workflows, notify users, and update documentation or training that mention Similarity Checker.
ROLLOUT TIMELINE
Upcoming:
October 2026
October 2026
📢 Official Microsoft Message Center Announcement
Microsoft Word: Similarity Checker retirement
Message ID: MC1466753
[What and why]
We are retiring Similarity Checker in Microsoft Word on October 3, 2026. After the retirement date, Similarity Checker will no longer be available as part of the Microsoft Editor experience in Word.
This change allows us to focus on experiences and capabilities that are more broadly used across Microsoft Word.
[Rollout schedule]
- Worldwide, GCC, and DoD: Beginning on October 3, 2026
[Impact on your organization]
Who is affected
- Organizations and users that currently use Similarity Checker in Microsoft Word
Platforms and services
- Microsoft Word
- Microsoft Editor
What will happen
- Similarity Checker will be removed from Microsoft Word.
- After retirement, users will no longer be able to access Similarity Checker through the Editor experience in Word.
- Other Microsoft Word writing, editing, and citation capabilities will not be affected.
- Microsoft Editor will continue to provide spelling, grammar, clarity, and style suggestions.
- Microsoft 365 Copilot capabilities in Word are not affected by this change.
- Note: Copilot is not intended to serve as a formal similarity, plagiarism, or originality validation tool.
[Action required and recommendations]
No action is required.
If your organization currently uses Similarity Checker:
- Review workflows that depend on Similarity Checker.
- Inform users who rely on the feature about the upcoming retirement.
- Evaluate alternative solutions if formal similarity or originality validation is required.
- Update internal documentation or training materials that reference Similarity Checker.
[Compliance considerations]
No compliance considerations identified. Review as appropriate for your organization.
Source: Microsoft Message Center • Analysed by MWPro
