Instructions apply to the desktop app, Outlook on the web, and the mobile app.
This option is called Delay Delivery.
Select thethree dotsand then chooseDelay Delivery.

Tick the box next toDo not deliver before.
Choose the date and time when you want to send the message.
SelectCloseon the properties window, and then selectSendto set up the delayed email.

When you’re finished writing your email, select thearrownext to the Send button and chooseSchedule send.
Tap a recommended time from the list or pickChoose a timeto be more specific.
Define the date and time the email should send, and then tapSchedule.

Write the message and then choose the drop-down arrow next to theSendbutton.
SelectSchedule send, choose a date and time, and then pressSend.

