Using older versions of Outlook for Mac in business environments
Thanks for reporting this issue. Microsoft is aware and actively investigating this behavior.
Replying to or forwarding an email does not include the original message in the email body in legac…
I have tested on previous version such as 16.109.3, and this behavior does not occur. Therefore, you may consider reverting to version 16.109.3 or older. This can be done by removing the current Outlook version and installing version 16.109.3 via Update history for Office for Mac - Office release notes | Microsoft Learn
After that, turn off automatic updates for Legacy Outlook for Mac by going to Help > Check for Updates > unchecking Automatically keep Microsoft apps up to date.
I apologize for the inconvenience this might have cause to your workflow, please revert back to precious version as a temporary workaround.
I will keep you updated if there's a fix for this. Thank you for your understanding and patience.
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