Introduction
On the "Home" tab, click New Email. Click the "Options" tab. Click Permissions and select the type of restriction you want.
Instructions
NOTE: When creating a new email message, you can specify permissions using the Information Rights Management (IRM). IRM allows you set restrictions on email messages, documents, workbooks and presentations. For example, you can restrict the email from being forwarded. IRM needs to be enabled on your Exchange Server for this functionality to work.
1) Open Microsoft Outlook for Mac.
2) Click Mail in the bottom left-hand corner of the Outlook window.
3) On the "Home" tab, click New Email.
4) Click Options.
5) Click Permissions and select the type of restriction you want.
NOTE: If you are using this option for the first time, you need to log in to the licensing server.
OUTCOME
The email will require a specific permission in order for the recipient to access it.