Calendar is great, issues with email notifications – Microsoft Outlook Review

Overall I really like this app. I'm having trouble with notifications though. The new mail sound that I enable within the app is not what actually plays, it's a default iPhone sound instead-- which I use for non-work emails. I've looked around in iPhone settings and can't find where the issue is. It's frustrating that I can't set a different sound for my work email so I can tell if I need to check it without getting my phone out.
Review by KM1214 on Microsoft Outlook.