Using older versions of Outlook for Mac in business environments
Thanks for reaching out! I'm an Independent Advisor and a Microsoft user like you.
This kind of problem mostly happens on New Outlook version, You can prevent this kind of issue temporary while Microsoft fixing this by going to Outlook preferences / composing and selecting "Open new messages and replies in a separate window"
If there's anything else you need to know or if you have further questions, please do let me know.
Regards,
Cyr.M
Independent Advisor