Note: Resending and recalling messages can only be done through the Outlook client which is the fully installed version, not the version accessed through Office 365 on the web.
In Mail, in the Folder Pane, click Sent Items.
Double-click the message that you want to resend.
On the Message tab, in the Move group, click Actions, and then click Resend This Message.
A new message window opens. If there are multiple recipients, you can remove recipients who don’t need to receive the message again. Click the names that you want to remove, and then press Delete.
To resend multiple messages, repeat these instructions for each message. There isn’t a way to resend multiple messages at one time.
Recall an email message:
Note: Recalling a message can take up to two minutes to process and will only be successful if the following conditions are met:
Double-click the message that you want to recall.
5. Select the appropriate options and click OK.