Hi @Ravi Rambukwelle
Welcome to our forum!
Based on my research, even if there are many accounts in a profile, outlook will reply using the receiving email address by default, and it goes well. However, if you are still worried about the occasional eventuality, it is suggested that please be patient to check the 'From' before sending emails.
In addition, if the issue persists, it is recommended that please try to upgrade the Outlook to the latest version.
Hope it helps!
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