This is true only for the app version itself, and all of the recall options on the web versions of Outlook should work just fine. For users that meet this initial requirement, the process is ...

you can recall an email when you’re using Microsoft Outlook, but you first have to know how to do so—and whether it’s even possible, since it’s not an all-the-time option. How to recall an ...

A function in Outlook that lets users delete an email message that they have sent and which has been received by the recipient. A Microsoft Exchange server or a recall-compliant mail server must ...