Items containing credit card numbers in our exchange and sharepoint. Purview

Hi amurkoko,

Microsoft Purview serves as a comprehensive data governance service, aiding organizations in the management and safeguarding of their data. Its capabilities extend to the detection of sensitive information types (SITs), such as credit card numbers, within the context of communication compliance policies.

Purview employs sophisticated built-in classifiers, harnessing a blend of AI and keyword analysis to scrutinize communication channels for configured SITs.

In the case of credit card numbers, a stringent classification pattern is applied—requiring a match of 14 to 16 digits, which can be in formatted or unformatted states (dddddddddddddddd), and must successfully pass the Luhn test.

So, the number you see in the “Information protection” section is not a simple guess, but a result of a more sophisticated detection process.

Credit card number entity definition | Microsoft Learn