Open Outlook
Go to the Sent Items folder
Double-click the email you want to recall
Select File
Select Info
Click Message Resend and Recall
Click Recall This Message
Choose Delete unread copies of this message or Delete unread copies and replace with a new message
Select Tell me if recall succeeds or fails for each recipient if needed
Click OK
If replacing the message, edit and resend the email
Recall works only if the recipient uses Outlook in the same Microsoft 365 or Exchange environment and has not read the message