Redline in Email version 3 (3.0 and later) requires Draftable Desktop 26.9.0.1 or later. Please update Draftable Desktop before, or at the same time as, deploying the new add-in. If you can’t update Draftable Desktop yet, keep your version 2 deployment for now, or deploy the release that matches your version of Draftable from Older versions on the Redline in Email card in the deployment guide.Version 3 is a new major version. If you are moving from version 2, you must update the Outlook add-in manifest in the Microsoft 365 admin center: the existing v2 auto-updating manifest will not deliver version 3. Organizations already on the v3 auto-updating manifest receive later 3.x releases automatically.
Release Notes
October 2026
Features & Improvements:
- Added support for running on Citrix and other machines that do not support SIMD processor instructions
October 2026
Features & Improvements:
- Added a clearer picker for choosing the email to compare against or editing without a comparison
- Reduced the time it takes to compare emails
- The task pane starts Draftable Desktop in the background when it needs to check your licence, if you have used Redline in Email on that computer before
- Fix for the task pane incorrectly reporting an expired licence while Draftable Desktop renews it
September 2026
Features & Improvements:
- Added a tracked-changes editor so you can make edits directly in the Outlook task pane
- This is a new major version. All organisations must update the Outlook add-in manifest to receive version 3.0; the previous
/latest/v2manifest will not roll this out automatically
July 2026
Features & Improvements:
- Added a unified menu that stays consistent whether you’re reading or composing an email
- Added a quick help section with in-product guidance for using Redline in Email
- Added totals for changes, insertions, and deletions
- Added progress feedback while accepting or rejecting changes
- Made the Compose and Review workflows easier to distinguish and navigate
- Made all available actions easier to find in smaller task panes
- Added a setting to choose whether images are included in comparisons to increase performance
- Moved the surrounding-context control beneath the preview for easier access
- Made email sync status clearer
- Clarified when the Copy button will copy only selected content
- Added clearer messages when no content, or too little content, is selected
- Reduced irrelevant whitespace changes in comparisons
- Fix for Redline closing or becoming unusable when links are clicked
- Fix for comparison quality involving bulleted lists
- Fix for intermittent licence-check reliability
- Fix for errors when comparing complex list items
- Fix for errors when emails contain unusual formatting
- Fix for strikethrough formatting not being preserved when copying part of a redline
June 2026
Features & Improvements:
- Added the ability to revert individual changes directly from the Redline Preview before applying them to your email
- Added an admin setting to hide the “Create New Email” button
- Added an auto-updating manifest option (/latest/v2) so future updates roll out without needing to redeploy the Outlook manifest each time
- Improved upgrade messaging so you’re clearly notified when Draftable Desktop needs updating to access the required Redline API
- Fix for diff quality in numbered and bulleted lists
- Fix for moved text not always being detected correctly
- Fix for errors when emails contained corrupt or unreadable images
April 2026
Features & Improvements:
- Added support for dark mode in Outlook
February 2026
Features & Improvements:
- Added ability to compare selected text within an email
- Added warning when users exceed the 32KB email size limit
- Improved table diff comparison quality
- Add-in now starts independently when Draftable Desktop is not available
- Fix for whitespace false positives in email comparisons
- Fix for copy button not working
December 2025
Features & Improvements:
- Updated to use light task-pane theme when Outlook theme is set to dark grey
- Improved handling of list items containing multiple paragraphs
- Removed Draftable in Office functionality (compare attachments, one click) — these workflows are now handled by Draftable in Outlook / Draftable for Outlook
November 2025
Bug fixes:
- Fix for InvalidOperationException caused by unexpected list item
- Implemented Private Network Access CORS support for compatibility with Chrome updates
- Fix for empty stack exception
October 2025
Features & Improvements:
- Added support for additional CSS measure units (in, mm, pi)
- Improved detection of forwarded/reply email headers
- Added platform and version information to error report emails
- Added telemetry with Application Insights
- Various UI test improvements
October 2025
Features & Improvements:
- Added Accept/Reject All option to streamline email review workflows
- Added undo button in the revision acceptor
- Added support for Continuous Access Evaluation (CAE)
- Added a “Report a Bug” button to assist error reporting and troubleshooting
- Added email share option to error screen
- Fix for “Change Baseline” button not working
- Fix for inline image support in New Outlook
- Fix for truncated “Apply to Email” button
- Fix for invalid sentinel values corrupting redline comparisons
- Fix for correct content type on WASM files