We use DLP on email to assist in our PCI compliance. As an online payments provider, we often provide dummy credit card information to help our customers set up their APIs (typically 4444 3333 2222 1111). Unfortunately, despite this not being a valid card number, it triggers Microsoft's built in "Credit Card" definition resulting in 100s of false positives per week. We need to have this hard coded as an exception to the "Credit Card" definition, or, better yet, allow definitions to be customised and/or excluded from via. the Admin portal.60 votes
As stan mentions below, this level of customization is certainly possible. There are many other tweaks you can perform based on your specific requirements. For example, you can only look for multiple cards together, or other identifying information like expiration dates. Please review the documentation and work with support as needed.
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