Microsoft Purview: Data Security Investigations – Introduction of cost estimator and transparency report

Introduction

We’re introducing a Data Security Investigations (DSI) lightweight cost estimator to help analysts model and forecast storage and compute unit costs based on specific use cases, enabling more accurate budget planning. In addition, a new usage report provides granular breakdowns of billed storage and compute unit usage, empowering DSI analysts to identify cost-saving opportunities and optimize resource allocation.

This message is associated with Microsoft 365 Roadmap ID 518225.

When this will happen

• Public Preview: Rollout begins early December 2025 and completes by early December 2025.
• General Availability (Worldwide): Rollout begins early February 2026 and completes by late March 2026.

How this will affect your organization

Who is affected: Admins and analysts using Data Security Investigations in Microsoft Purview.

What will happen

• A new in-product cost estimator will be available to model storage and compute unit costs.
• A usage dashboard report will provide detailed billed storage and compute unit breakdowns.
• These features are designed to support pay-as-you-go billing transparency.
• The rollout will occur automatically; no configuration changes are required.
• Features will be enabled by default for all tenants.

Visual examples

Screenshot 1: Data Security Investigations cost estimator

Screenshot 2: Data Security Investigations usage dashboard

What you can do to prepare

• No admin action is required before rollout.
• Consider notifying your users about these changes.
• Update any internal documentation that references DSI billing or cost management.
• Learn more:
  • Billing in Data Security Investigations | Microsoft Learn
  • Learn about Data Security Investigations | Microsoft Learn

Compliance considerations

No compliance considerations identified, review as appropriate for your organization.