It also works with Office 365, Outlook 2019, Outlook 2016, Outlook 2013, Outlook 2010. It is applied to Outlook connected to POP or Exchange Server connection and even IMPA service.
One by setting this option for the emails you want or second by creating rules where you can specify conditions that will make it delay.
Delay Delivery is an excellent feature in Outlook if you want to send emails later, i.e., Send a future email.