Outlook: How to revert notification sounds to default?

[oceanclub]

While configuring Outlook for Android notifications, I inadvertently changed the "New Mail Sound" from the default, "Outlook Sent Mail" to a local mp3. I'm not sure not sure how I change it back as I don't know the directory location of the mp3/wav associated with "New Mail Sound". Hopefully someone can point me to it!

P.