University of Southampton


Office 365 What is Data Loss Prevention (DLP)?

Data Loss Prevention helps you to keep important information safe by reducing the risk of sending sensitive or critical information internally or externally from the University.  Within Office 365, there are background technologies that check content and will alert you before sending or sharing data, supporting recent GDPR legislation.

For example, you might be sending an email which has a credit card number, using Outlook (web or client version). You will receive a warning message before the email is sent encouraging you to check and think before sending.


What types of Data does it check?

- Credit card numbers

- EU debit card numbers

- UK NHS numbers

- UK National Insurance numbers

- UK and US passport numbers


What should I do if I get a warning?

The warning is there to help you consider whether to send potentially sensitive or critical data.

Please contact ServiceLine if you have any questions or concerns. 


Additional resources to help you make the most of office 365

  1. Microsoft Training Center

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