Using aliases from the new Outlook app for Android

I'm having trouble using the new Microsoft Outlook app to send e-mails from different aliases under the same account. I have my primary (and original) e-mail added, but when I compose a new message, it no longer gives me all my other e-mail aliases from the drop-down function to choose a different "send from" address (not Gmail or another service, but simply aliases within the same Microsoft account). The old app had them on the drop-down when composing a new e-mail, this one doesn't. I've tried adding my other aliases as other accounts, but it simply tells me that this account has already been added (which it has, but not the aliases).

This along with the now non-existent option to download files directly to my device is making me dislike this new app. I feel like a perfectly good app has been ruined for nothing. It might look fancier but does not work as well and is more confusing that it needs to be.

Any help is appreciated.

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