There is a catch–per the related support, -The recipient must use Outlook -The recipient must be logged on to the mail service provider -The recipient must not be using Cached Exchange Mode/working offline -The original message cannot be moved from the Inbox (so if the recipient has rules that would move your message, you’re out of luck) -The original message cannot be opened and/or marked as read To attempt to Recall a message, navigate to the Sent folder in Outlook. Open the email in question and select the “other actions” button in the Move section of the menu. Select “Recall This Message”: Select an option and I suggest leaving the “Tell me if.” checkbox checked so you’ll know if the Recall worked: Example of a failed recall status message.
Recent previews of Microsoft solutions are rather stable. Office 2011 for Mac used to be a lot better than the version for the Windows users several years ago. Microsoft’s servers were rather slow or not responding. They were clearly not prepared for such a high demand.