MC1423117 – M365 Change Digest

One-line summary

PDF viewer in OneDrive and SharePoint Online gains a thumbnail panel for improved navigation, allowing users to visually browse and jump to specific pages.

Similar updates

Details

Summary

OneDrive and SharePoint on the web will add a default-enabled thumbnail view in the PDF viewer by mid-August 2026, allowing users to visually browse and jump to PDF pages easily. No admin action or changes to permissions are required; organizations should update training and inform users.

Body (from Message Center)

[What and Why:]

We are improving PDF navigation in OneDrive and SharePoint on the web by adding a thumbnail view in the PDF viewer. Users will be able to open a thumbnail panel to visually browse pages in a PDF and jump directly to a selected page. This update helps users navigate long PDFs more quickly, especially when they need to find a visual section, page layout, chart, image, or form page without scrolling page by page.

This message is associated with Roadmap ID 566696.

[Rollout Schedule:]

Targeted Release (Worldwide): Beginning early August 2026; expected to complete by mid-August 2026
General Availability (Worldwide, GCC, GCC High, DoD): Beginning mid-August 2026; expected to complete by late August 2026

[Impact on Your Organization:]

Who is affected: All users who view PDFs in OneDrive and SharePoint on the web

Platforms/Services:

OneDrive (Web)
SharePoint (Web)

What will happen:

Users will see a new option to open a thumbnail pane in the PDF viewer.
A visual list of page thumbnails will be available for navigation.
Users can select a thumbnail to jump directly to a specific page.
The currently viewed page will be highlighted in the thumbnail pane while scrolling.
The feature will be enabled by default.
There are no changes to file permissions, sharing behavior, sensitivity labels, download behavior, or admin controls.

Screenshot: Browse PDF pages with visual thumbnails:

user settings

[Action Required/Recommendations:]

No admin action is required.

Recommended actions:

Inform helpdesk and support teams about this user experience improvement
Update internal training materials or documentation if they reference PDF navigation workflows
Consider notifying users who frequently work with long or complex PDF files

[Compliance considerations:]

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

Raw JSON (for debugging)

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    ],
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    "ai_summary": "PDF viewer in OneDrive and SharePoint Online gains a thumbnail panel for improved navigation, allowing users to visually browse and jump to specific pages.",
    "ai_topics": [
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    "category": "stayInformed",
    "details_map": {
      "Summary": "OneDrive and SharePoint on the web will add a default-enabled thumbnail view in the PDF viewer by mid-August 2026, allowing users to visually browse and jump to PDF pages easily. No admin action or changes to permissions are required; organizations should update training and inform users."
    },
    "id": "MC1423117",
    "importance": 2,
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    "last_modified": "2026-07-10T22:53:50Z",
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    "roadmap_ids": [],
    "services": [
      "SharePoint Online",
      "Microsoft OneDrive"
    ],
    "severity": "normal",
    "tags": [
      "Feature update",
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    ],
    "title": "Thumbnail view for PDFs is available in OneDrive and SharePoint on the web"
  }
}