Outlook on the Web offers two main use delivery options; "request a delivery receipt" and "request a read receipt".
These options can be easily accessed/set via the message composition window.
While composing a message, click the extended menu .
Next, click show message options.
Place a check mark next to the request a read receipt option and click OK.
You can request a delivery receipt to let you know when a message that you've sent has reached the recipients. A read receipt will tell you when a message that you sent has been marked as read. Some email programs allow recipients to choose if they will respond to read receipts.
Escalation: If you have further questions, talk to a Supervisor or HD2.
Cherwell Classification: Office 365 > Office 365 Email > Email How To