I select my alias email address when replying to an email that came from that alias email address. When the email sends it comes from my default email address and not the alias even though I selected the alias from the list of email address in my Outlook account.

I'm using Microsoft Outlook for MAC 15.24

Is this an issue with anyone else and if so how can I fix it without changing the default on Outlook online every time I reply to an email that comes from one of my alias accounts. The purpose of my aliases is to keep my emails in order but if people are getting the replies from my default account this will be confusing for them on which email is the right one to use.