How to Manage Organization-Wide PST Encryption and Intune Policies
Question details
The user needs to implement organization-wide controls to encrypt PST files exported from managed devices and prevent their use on unmanaged devices.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Enforcing data protection and device compliance policies for exported Outlook data files.
- Observed behavior
- Seeking the proper configuration of Microsoft Purview, Intune, and Exchange Online to restrict PST access and protect exported corporate data.
Ensure you have global administrator or security administrator privileges in your Microsoft 365 tenant before attempting to modify Intune or Purview policies.
Configure Microsoft Purview and Intune for PST Data Protection
Use a combination of Microsoft Purview Information Protection, Conditional Access, and Intune App Protection Policies to secure PST files across the organization.
Because PST files are local data files, controlling them requires a multi-layered security approach. Microsoft Intune handles device management, while Microsoft Purview and Azure AD Conditional Access provide the actual data encryption and access restrictions.
Navigate to the Microsoft Endpoint Manager admin center to configure device compliance and app protection policies that restrict data sharing between managed and unmanaged applications.
Access the Microsoft Purview compliance portal. Create and publish sensitivity labels that enforce encryption and endpoint data loss prevention (DLP) on exported data, including PST files.
In the Azure Active Directory portal, configure Conditional Access policies to block access to Microsoft 365 services and Exchange Online from unmanaged or non-compliant devices.
For highly specific enterprise environments, navigate to the official Microsoft Q&A forum and post your scenario under the 'Microsoft Intune' or 'Microsoft Purview' tags to get guidance from security specialists.
Looking for a Secure and Cost-Effective Office Suite?
While Microsoft Intune manages enterprise PST encryption and device compliance, WPS Office provides a free, lightweight, and highly compatible alternative for everyday document editing without the heavy administrative overhead of Microsoft 365.
- 1. Download WPS Office: Visit the official WPS Office website and download the free installation package for your operating system.
- 2. Install the Application: Run the downloaded installer and follow the simple on-screen instructions to set up the software.
- 3. Secure Your Documents: Open WPS Office and utilize the built-in encryption features under the 'Protect' tab to secure your local files.
Frequently Asked Questions
Can Microsoft Intune directly encrypt PST files?
Intune itself manages devices and applications. To encrypt PST files, you must use Microsoft Purview Information Protection to apply sensitivity labels and Endpoint Data Loss Prevention (DLP) policies.
How do I prevent Outlook from creating new PST files?
You can prevent the creation of new PST files by configuring Group Policy Objects (GPO) or deploying Intune Administrative Templates that disable the 'Add PST' feature in Microsoft Outlook.
Are PST files supported on unmanaged devices?
PST files can technically be copied to unmanaged devices unless restricted by Endpoint DLP policies. Implementing strict Conditional Access ensures that even if a PST is copied, the user cannot connect it to an active Exchange mailbox from an unmanaged device.
