How to Send an Email with a Different “From” Address in Outlook

If you have multiple email accounts in Microsoft Outlook, you can change the “From” address in a new email. This is quicker than swapping to a different inbox, and lets you send emails from different addresses, even if they aren’t your own. Here’s how—with some caveats.

https://www.howtogeek.com/689267/how-to-send-an-email-with-a-different-from-address-in-outlook/