Is Office 365 PCI Compliant?

Can You Store PCI Data in Office 365?

Office 365 is a suite of cloud-based software applications owned by Microsoft. As one of the largest and commonly used cloud-service providers, Microsoft has taken steps to ensure many of its products comply with the Payment Card Industry (PCI) Data Security Standards (DSS).

For example, Microsoft includes a Compliance Manager within Office 365 that can be used to assess your organization’s compliance risks. The compliance manager can be used to identify which actions you should take to reduce your compliance risks, such as setting up access controls. 

Note that Office 365 is not PCI DSS compliant straight out of the box and that Microsoft advises against using Microsoft 365 to store card and cardholder information, however your organization can configure Office 365 to bring it into compliance with PCI DSS. Keep in mind that, if you choose to store PCI data within Office 365, your organization is wholly responsible for ensuring compliance with PCI DSS.

Can PCI Data be Leaked from Office 365?

Achieving Office 365 compliance with PCI DSS is not a one and done procedure. Your organization must maintain compliance on an ongoing basis. Even with security configurations in place, sensitive PCI data must be handled correctly in order to comply with PCI DSS. 

Where a dedicated data loss prevention solution is not in place, your employees must be trained on how to handle sensitive PCI data appropriately. Accidental data leaks or unauthorized access are common sources of data leaks.

As well as misconfigured permissions and inadequate user training, sensitive PCI data is often the target of external threats. To effectively shield PCI data from accidental leaks and malicious external threats, organizations can implement DLP solutions that identify and redact documents sensitive PCI data.

✨ What are the New PCI 4.0 Requirements for PCI Data in Office 365?

PCI DSS 4.0 is a major step forward from the previous version 3.2.1.  PCI DSS 4.0 introduces a number of new requirements, designed to better protect cardholder data on cloud-based platforms such as Office 365. 

The key updates to be aware of include: 

1. No Unauthorized Copy/Relocation of PAN

New requirement 3.4.2 is intended to protect the Primary Account Number (PAN) from unauthorized copying or relocation across all platforms, including cloud-based services like Office 365.

This requirement stipulates that only authorized individuals with recorded approval and a valid business justification are permitted to copy or transfer PAN. 

This level of control is crucial in cloud settings like Office 365, where data is frequently more vulnerable to unauthorized access because of its widespread and remote distribution.

2. PAN Must Be Unreadable

Requirement 3.5.1.1 requires making PAN unreadable when stored, applicable to databases, files, and logs housed on platforms such as Office 365.

This requirement aims to enhance data security through the use of cryptographic hashes of the full PAN, ensuring that account numbers are encrypted and indecipherable. 

This measure secures PAN against unauthorized access and breaches, particularly when stored in a cloud-based environment such as Office 365.

3. Incident Response for PAN Data Leaks

Requirement 12.10.7 is designed to encourage active incident response procedures whereby immediate notification is initiated on the detection of PAN in any unauthorized location.

The objective here is to quickly address potential sources of data breaches by identifying PAN, so that action can be taken to relocate the sensitive PCI data to a secure location.

This requirement underlines the need for continuous monitoring and prompt response capabilities and incident management strategies within Office 365.

4. Protecting Payment Information in Office 365

In the interests of mitigating leaks of sensitive customer information, organizations are advised against storing cardholder data unless there is a specific need to do so.

Suggestions for protecting PCI data include:

• Endpoint devices such as payment card terminals should not retain card data.
• Where PAN or payment card information is printed, such as on receipts, it should be truncated or masked to safeguard the cardholder's information.
• Servers and storage devices should be kept locked with access-controls in place at all times.
• Comprehensive access controls must be enforced to reduce the risk of unauthorized access of any stored PCI data.

Collectively, these practices can address digital and physical security concerns and safeguard sensitive cardholder information stored in cloud-based applications such as Office 365.

To maintain compliance with PCI DSS 4.0, organizations using Office 365 must evaluate and update their existing configurations and operational procedures. This involves regular assessments on your use of Office 365 to ensure ongoing alignment with the requirements of PCI DSS 4.0, especially focusing on encryption and access controls.

🎥 How Can Strac Enhance Data Security on Office 365?

Strac is a comprehensive data loss prevention solution, offering robust features that safeguard sensitive information across Office 365 and other platforms. ‎

Here’s how Strac reinforces data security:

• Customizable Detection Capabilities: Strac supports detectors for sensitive data elements including PCI, HIPAA, GDPR, and more. It uniquely allows users to configure their own detectors, ensuring even sensitive data embedded in images or various document formats are securely managed. Explore Strac’s extensive catalog of sensitive data elements.
• Achieving Compliance with Ease: Strac’s DLP solution helps organizations achieve compliance with major standards like PCI, SOC 2, HIPAA, ISO-27001, CCPA, GDPR, and NIST, providing peace of mind and ease of management.

• Integration and Automation: Strac integrates seamlessly in under 10 minutes, offering immediate data protection such as live scanning and redaction in SaaS applications. This high level of integration and automation facilitates efficient and immediate protection of sensitive data. Check the available Strac integrations.
• Advanced Accuracy in Detection and Redaction: Utilizing custom machine learning models, Strac ensures highly accurate detection of sensitive data, minimizing both false positives and false negatives, thus enhancing operational reliability. Learn more about Strac's Office 365 DLP solution.
• Support for Developers: Strac offers API access, allowing developers to create custom data detection and redaction solutions. Developers can find more resources in Strac’s Developer Documentation.
• Content-aware PCI detection: Detects payment card data, PANs, CVVs, expiration dates, and other sensitive information across Outlook, SharePoint, OneDrive, Teams, attachments, PDFs, images (OCR), and hundreds of file types using ML-powered detection instead of relying solely on regex.

• Real-time remediation: Automatically redact, mask, quarantine, delete, encrypt, block, or notify users when PCI data is detected, helping prevent accidental exposure before it becomes a compliance incident.

• Continuous discovery of sensitive data: Continuously scans Microsoft 365 repositories to discover forgotten or misplaced PCI data, giving security teams visibility into where sensitive information resides.
• Office 365 and SaaS-wide protection: Extend the same PCI policies beyond Microsoft 365 to platforms like Salesforce, Slack, Google Workspace, Zendesk, Jira, Notion, Confluence, and other business applications from a single platform.
• Endpoint, browser, and upload protection: Monitor sensitive PCI data copied, uploaded, or shared from Windows and macOS endpoints, including browser uploads to web applications and AI services, reducing accidental data leakage.

• GenAI and MCP DLP: Prevent payment card data from being pasted into ChatGPT, Microsoft Copilot, Claude, Gemini, and other AI assistants while also protecting data flowing through MCP-connected AI agents and enterprise applications.

• Unified DSPM + DLP: Combine sensitive data discovery, classification, posture management, and inline remediation within a single platform, eliminating the need for separate discovery and DLP tools.

• Compliance-ready policies: Accelerate PCI DSS 4.0, GDPR, HIPAA, SOC 2, ISO 27001, CCPA, and NIST initiatives with built-in detection policies, audit logs, and centralized reporting.

• Fast, agentless deployment: Deploy in minutes with minimal operational overhead while integrating seamlessly with Microsoft 365 and existing security workflows.

• Comprehensive visibility and analytics: Monitor PCI exposure trends, remediation activity, policy violations, and compliance posture across Microsoft 365, SaaS applications, endpoints, cloud storage, and AI environments through a unified dashboard.

Strac’s DLP solutions extend beyond traditional data protection measures, ensuring continuous compliance and security in an increasingly complex digital landscape.

Learn more about the Strac Office 365 integration. Book a free 30-minute demo for a practical demonstration of Strac’s DLP solutions.

Bottom Line

Office 365 provides a strong foundation for securingbusiness data, but PCI DSS compliance depends on how your organizationconfigures, monitors, and protects cardholder information. As payment dataincreasingly flows through email, Teams, SharePoint, OneDrive, AI assistants,and connected business applications, organizations need continuous visibilityand real-time protection—not just periodic compliance assessments. Modern DLPplatforms like Strac help discover, classify, monitor, and automaticallyremediate sensitive PCI data across Microsoft 365, SaaS applications,endpoints, GenAI, and MCP-connected workflows, reducing the risk of dataleakage while simplifying PCI DSS 4.0 compliance.

🌶️ Spicy FAQs on Office 365 PCI DSS Compliance

1. Is Office 365 PCI DSS compliant?

Microsoft provides infrastructure and compliancecapabilities that can support PCI DSS requirements, but Office 365 is notautomatically PCI DSS compliant. Organizations remain responsible forconfiguring security controls, managing access, encrypting data, and protectingcardholder information in accordance with PCI DSS 4.0.

2. Can I store payment card data in Office 365?

Yes, but only if there is a legitimate business need. PCIDSS recommends minimizing the storage of cardholder data whenever possible. Ifpayment data must be stored, organizations should implement encryption, strictaccess controls, continuous monitoring, and data loss prevention to reducerisk.

3. What are the biggest PCI data leakage risks inMicrosoft 365?

Common risks include users emailing payment information,storing PAN data in SharePoint or OneDrive, sharing files through Teams,uploading documents to AI assistants, browser uploads to unauthorized services,and overly permissive sharing settings that expose sensitive files.

4. How does DLP help with PCI DSS compliance in Office365?

A modern DLP solution continuously discovers payment carddata, detects sensitive information in emails, files, chats, and attachments,and can automatically redact, block, quarantine, encrypt, or remove sensitivedata before it is exposed. This helps organizations meet key PCI DSS 4.0requirements while reducing manual effort.

5. How does Strac protect PCI data beyond Microsoft 365?

Strac extends PCI protection beyond Office 365 by securingsensitive payment data across SaaS applications, cloud storage, endpoints,browsers, GenAI platforms like ChatGPT and Microsoft Copilot, and MCP-connectedAI workflows. With unified data discovery, real-time remediation, andcompliance-ready policies, organizations can enforce consistent PCI protectionwherever cardholder data moves.