New Outlook for Windows currently does not fully support all Word formatting and advanced typography features when pasting content from Word into an email. Classic Outlook and Word share richer, MAPI-based integration and a more complete Word rendering engine, which is why formatting is preserved more reliably there.
In addition, recent changes to Word/Outlook typography and layout features have introduced regressions that affect how text is rendered and formatted in classic Outlook and Word. These issues have been addressed in newer Office builds:
- Advanced Typography settings
- Advanced Typography was enabled by default starting with version 2403 (Build 17410.20000) and some controls were temporarily missing in later builds.
- The missing settings were restored starting in Version 2502 (Build 18501.20000). Updating Microsoft 365 Apps to at least this build ensures the full set of typography controls is available again, which can help with layout/formatting consistency between Word and Outlook.
- Formatting-related Word/Outlook errors
- A separate issue in Current Channel Version 2510 (Build 19328.20158) caused Word and classic Outlook to show errors such as “The text formatting command is not available” when opening emails/documents.
- This was fixed in later builds (for example, Current Channel Version 2511 Build 19426.20186 and others listed in the article). Updating Office to one of the fixed builds is recommended to avoid formatting-related failures.
Given the current product behavior:
- For scenarios where preserving complex Word formatting is critical (executive updates, master documents, round-tripping content), classic Outlook remains the more reliable option because it uses the full Word editor engine and MAPI integration.
- Ensure Microsoft 365 Apps are updated to a build that includes the typography and formatting fixes (e.g., Version 2502+ for Advanced Typography settings and Version 2511+ for the “text formatting command” issue) to minimize formatting regressions when working between Word and classic Outlook.
- If New Outlook must be used, consider simplifying formatting in Word (avoiding advanced typography or complex hidden text scenarios) before copying, but for full-fidelity formatting and easy round-tripping back to Word, classic Outlook is currently the better choice.
Feature changes and fixes for New Outlook and Word/Outlook integration are ongoing. Monitoring the Office update history and known-issues pages, and keeping Office on a current, fixed build, is the best way to regain and maintain the desired formatting behavior as improvements ship.
References:
- Advanced Typography settings are missing in classic Outlook and Word
- Error “The text formatting command is not available” when opening emails in classic Outlook or documents in Word for Windows
- Office 365 apps insist on using Outlook Classic to share documents to email - Microsoft Q&A
- Hidden text being hidden suddenly causing formatting issues in subsequent (not hidden) paragraph - Microsoft Q&A
- Why is my TOC not Updating? - Microsoft Q&A