Unlike the web application, the Outlook app doesn’t offer a direct sign-out option. Since the app allows you to sign in to multiple accounts, like Gmail, it also requires you to remove them ...

It might delete the email that is causing you trouble ... Read: Email in Outlook not syncing? Repair Outlook account.

Remove the account you are having an issue with on the Outlook app and add it again. If a corrupted cache or temporary files have caused this issue, adding the account again after removing it can ...