Click Delete unread copies of this message or Delete unread copies and replace with a new message, and then click OK.You cannot recall a message in Outlook on the web.You cannot recall a message that’s protected by Azure Information Protection.If you don’t see the Recall This Message command, you probably don’t have an Exchange account or the feature isn’t available within your organization.From the Message tab, select Actions > Recall This Message.Selecting the message so it appears in the reading pane won’t allow you to recall the message. You must double-click to open the message. Open the message that you want to recall.In the folder pane on the left of the Outlook window, choose the Sent Items folder.Message recall is available after you click Send and is available only if both you and the recipient have a Microsoft 365 or Microsoft Exchange email account in the same organization. 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. You can also substitute a replacement message.

With message recall, a message that you sent is retrieved from the mailboxes of the recipients who haven’t yet opened it.

Microsoft outlook recall email failure