Correct Answer:
See the solution below in Explanation
Explanation:
To block users from sending emails containing information subject to the Payment Card Industry Data Security Standard (PCI DSS), you can create a Data Loss Prevention (DLP) policy in Microsoft Exchange Online. Here's how:
Create a Custom DLP Policy:
Log in to the Microsoft Exchange Online admin center.
Navigate to Data loss prevention > Policy.
Create a new custom policy specifically for PCI DSS compliance.
Define Conditions:
In the policy settings, define conditions that identify sensitive data related to PCI DSS. For example:
Keywords: Include terms like "credit card," "debit card," or specific card number formats.
Regular Expressions (Regex): Craft expressions to match credit card patterns (e.g., \b\d{4}-\d{4}-\d{4}-\d{4}\b for Visa/Mastercard).
Sensitive Information Types: Use built-in or custom sensitive information types related to payment cards.
Choose Actions:
Specify the actions to take when sensitive data is detected in emails:
Block: Prevent the email from being sent.
Notify Sender: Inform the sender that sensitive data is not allowed via email.
Add Disclaimer/Watermark: Optionally add a disclaimer or watermark to the email.
Apply the Policy to Emails Only:
Ensure that the policy is configured to apply only to emails (not other communication channels).
Exclude internal communication if necessary.
Test and Monitor:
Enable the policy in test mode initially to validate its effectiveness.
Monitor logs and adjust the policy as needed.