Recall or replace an email message that you sent

With message recall, a message that you sent is retrieved from the mailboxes of the recipients who haven’t yet opened it. You can also substitute a replacement message. For example, if you forgot to include an attachment, you can try to retract the message, and then send a replacement message that has the attachment.

Message recall is available after you click Send and is available only if both you and the recipient have an Office 365 or Microsoft Exchange email account in the same organization.

To read the full help article please CLICK HERE.