Forum Discussion
Add "Delay delivery" to outlook.com (web) and mobile apps
RobinCartier This was added to outlook on the web months ago
Schedule send for Outlook on the web - Microsoft Support
It is in the Send button menu in outlook on the web.
Depending on your interface, it is at the top of the bottom of the compose forum.
Outlook desktop has a delay for outside of your business hours (for exchange accounts) - this doesn't need outlook open to send as the message is held on the server.
Nothing yet for Outlook mobile, but if added would likely only apply to outlook.com and office 365 mailboxes.
Diane_Poremsky_MVP
My Outlook for Web does not display any Send menu, and I have tried a lot of ways to try to locate it. That's not meant as a slight towards your post, the Microsoft help page was far less helpful than this post, so it's nice to know that some people can set up delayed delivery via Outlook 365's web browser based platform. Not being able to find the Send options menu could also be due to updates to the web version since this was posted, but it seems odd for them to remove functions.