Overview
As announced in a CSULB CIO message titled Preventing Accidental Exposure of Sensitive Information via Campus Email, this new email security data loss prevention tool goes into effect on November 18, 2019.
Scope
The automatic scan tool will display a warning message ("Policy Tip") on the following programs:
- Microsoft Outlook desktop client for both Windows and Mac computers
- Outlook on the web / Office 365 (mail.csulb.edu)
The Policy Tip does not display on the following programs, but users will receive the automatic warning email from Microsoft:
- Microsoft Outlook app for iPhone and Android phones/devices (downloadable from Apple and Google Play Stores)
- MacMail connected to campus email
The automatic scan tool does not work with Apple/Mac or Google native email clients.
Example (Outlook on a Desktop)
This is the message that will show up if an email is sent to an external recipient that Microsoft deems as having sensitive information (SSN, CC or Passport info). This information can be in the body of the message or in an attachment.

Note: DLP will work on the Outlook desktop client for Windows and Mac as long as the user has the policy tip notifications enabled (which is the default). The message can be sent without clicking the override link. (Override link shown in the screenshot.)
Examples (Outlook on the web / O365)
This is the message that will show up if an email is sent to an external recipient that Microsoft deems as having sensitive information (SSN, CC or Passport info). This information can be in the body of the message or in an attachment. Note: There is no override option in OWA and OWA has additional viewing options the desktop client does not.

This is the expanded message that shows if a user clicks on the ‘show details’ link in the first screen shot above.

This is the message that shows up if someone hovers over the ‘Learn more’ link after expanding the message.

If the user chooses to send the email anyway (ignoring the warnings), he/she will receive this message:

Outlook Mobile App
The Policy Tip does not display, but if the user sends an email that fits the senstive information criteria, they will receive a message by Microsoft indicating so.