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.

To recall and replace a message in New Outlook

1. Select Sent Items in the left folder pane, then double-click the sent message to open it in a separate window.

2. From the ribbon, select   Recall Message, then select OK in the confirmation dialog box.

3. Shortly thereafter, you'll receive a Message Recall Report in your inbox. Select the link in that message to see whether your recall has succeeded, is pending, or failed.
    

Recall a message in Outlook on the web (webmail.catawba.edu)

1. Select Sent Items in the left folder pane, then double-click the sent message to open it in a separate window.

2. From the ribbon, select   Recall Message, then select OK in the confirmation dialog box.

3. Shortly thereafter, you'll receive a Message Recall Report in your inbox. Select the link in that message to see whether your recall has succeeded, is pending, or failed.

To recall and replace a message in Classic Outlook

1. In the folder pane on the left of the Outlook window, choose the Sent Items folder.

2. Open the message that you want to recall. You must double-click to open the message. Selecting the message so it appears in the reading pane won't allow you to recall the message.

3. If you have the Classic Ribbon, from the Message tab, select Actions > Recall This Message.

   
   
   If you have the Simplified Ribbon, select the Message tab and then select More commands (...). Point to Actions and select Recall This Message. 
   

   Notes: 

   • 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.

   • You can't recall a message that's protected by Azure Information Protection.

   • You can't recall a message in Outlook on the web.

4. Select Delete unread copies of this message or Delete unread copies and replace with a new message, and then select OK.

   

5. If you’re sending a replacement message, compose the message, and then select Send.