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Legacy Outlook for Mac is now removing history when emails are replied or forwarded

RK 0 Reputation points
2026-06-13T02:20:58.9933333+00:00

Hi All,

I use Outlook version 16.110 on a Mac (M2Pro) running MacOS Tahoe 26.5

After last Microsoft update, when i am replying or forwarding; i see history of the email chain is getting removed. This is not expected as we cant check the email to understand the full history.

In search i found another thread which talking the exact same issue. I tried to implement the recommendations given in this thread, but it did not fixed my issue. I tried to tag this issue in that. But i was advised to open a new thread, hence i am opening this thread.

I use Outlook Legacy mode as it offers browsing from one email to other emails using keyboard option (ctrl+[ / ctrl ] ) and this option does not work in newer look.

Please help me to fix this issue. Let me know if you need any more details about the issue. If needed i can show the issue in a zoom/team web call as well.

Outlook | MacOS | Legacy Outlook for Mac | For business
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  1. Dora-T 14,175 Reputation points Microsoft External Staff Moderator
    2026-06-13T02:55:04.6233333+00:00

    Hi RK

    Thank you for reaching out to the Microsoft Q&A Forum. 

    I understand how inconvenient this can be, especially when you rely on the message history to follow the conversation thread. 

    Based on my research, I found that a few other users recently experienced very similar behavior in Legacy Outlook for Mac version 16.110, where replying to or forwarding emails no longer includes the original message content. 

    As a temporary workaround, a rollback to an earlier version, such as 16.108 or 16.109.3, appears to have helped in similar cases. You may want to try this and see whether the issue persists: 

    +Open any Office app > Help > Check for Updates > clear the checkbox for “Automatically keep Microsoft Apps up to date.” 

    +Quit all Office apps.      

    +Go to Applications > choose Microsoft Outlook > Move to Trash.  

    +Install the 16.108, 16.109 or 16.109.3 package from this link: Update history for Office for Mac - Office release notes | Microsoft Learn  

    You can refer to the following discussions: 

    Please understand that this is a public peer-to-peer community forum. While moderators and community members can share guidance and experiences, we do not have access to internal diagnostic tools and are unable to arrange Teams support sessions through the forum. 

    I hope this helps. Please let me know how it goes after trying the rollback.  

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  2. AI answer

    2026-06-13T02:21:11.91+00:00

    The described behavior matches a known issue where message content or headers are truncated when replying or forwarding in some Outlook for Mac builds. These issues have been addressed in later updates of Outlook for Mac.

    To resolve the problem where history is removed when replying or forwarding in Legacy Outlook for Mac:

    1. Update Outlook for Mac to the latest available build for the channel in use. Several reply/forward and header‑truncation issues have been fixed in newer versions, for example:
      • A fix for truncated reply/forward headers in certain languages in build 16.20 (181208).
      • Multiple fixes to reply/forward behavior and plain‑text handling in later 16.xx builds, as reflected in the release notes.
    2. After updating, restart Outlook and test reply/forward on a new message chain to confirm that the full conversation history is preserved.
    3. If the issue persists after updating to the latest build, create a new Outlook profile and re-add the account, then test again. Corrupted profiles can cause unexpected reply/forward behavior.
    4. If still affected, consider switching from Legacy Outlook for Mac to the new Outlook for Mac client, as Legacy Outlook is in maintenance mode and will reach end of support against Exchange Online in October 2026. The new client receives the most up-to-date fixes and feature improvements.

    If blocked from accessing required features or updates, contact Microsoft support for assistance, as recommended for customers impacted by Legacy Outlook limitations.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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