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

Microsoft Purview introduces a Data Security Investigations cost estimator and usage report for better budget planning and cost transparency. Rolling out from December 2025 to March 2026, these features enable detailed billing insights with no admin action needed and are enabled by default for all tenants. 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: View image in new tab View image in new tab 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. Message ID: MC1186360

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