Improved PDF preview in Outlook for iOS [MC1384419]

Message ID: MC1384419

[What and Why:]

We’re updating the PDF preview experience in Outlook for iOS. This change adds support for Microsoft Information Protection (MIP)–labeled PDFs and introduces a built-in controls toolbar to improve navigation and search when viewing PDF attachments.

This message is associated with Roadmap ID 564970.

[Rollout Schedule:]

General Availability (Worldwide, GCC, GCC High, DoD): Rollout begins in early July 2026 and is expected to complete by early September 2026.

[Impact on Your Organization:]

Who is affected: All users who view PDF attachments in Outlook for iOS.

Platforms/Services:

• Outlook for iOS (mobile)
• PDF attachment preview

What will happen:

• Users can preview MIP-labeled (protected) PDF files directly in Outlook for iOS.
• A controls toolbar appears at the bottom of the PDF preview, enabling:
• Zoom in and out
• Page navigation
• Keyword search within the PDF
• The Open in Copilot button has moved to the More (…) menu in the upper-right corner.
• The feature is enabled by default.
• No changes are made to current admin configurations or user workflows beyond the enhanced preview experience.

[Action Required / Recommendations:]

• No action is required. This feature is enabled automatically.
• Consider notifying end users about the improved PDF preview and new toolbar controls to reduce help desk inquiries.
• Update internal documentation or training materials if you reference Outlook mobile PDF behavior.

[Compliance considerations:]

No compliance considerations identified, review as appropriate for your organization.

Source: Microsoft

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