I would like to add my voice to this thread.
I have logged the missing alias feature with Microsoft via feedback & noted that there are MANY requests/complaints about this missing feature in the Android app going back months!
I have 3 aliases on my Outlook account; 1 for serious stuff (alias1), 1 for personal/social (alias2), & 1 for work specific stuff (alias3). From the web portal I can send from any; on the Android app, not only can I only send from the main account alias1;
but it also replies to previously replied responses using either alias1 or alias3, ignoring alias2 & with no option to change it!! I seem to have no control over which!!
I used to rely on Virgin.net email where I could have as many alias mailboxes as I liked & could add each to IMAP as an account & maintain control that way.
I moved to Outlook.com because it was separate from my old ISP; aliases work great on the web browser interface, but if I add each Outlook alias as a different account in the Android app then my internal storage gets pillaged because it will contain multiple
copies of the content, 1 for each account, not just the content for that alias.
I have trusted that MS would see fit to fixing this bug for months/years since there is such a body of complaint about it on feedback but still no joy.
Do I really need to move away from using Outlook.com to get a properly working app experience?
Many thanks in advance.