10-year audit log retention

Microsoft 365 Advanced Audit with 10‑year audit log retention extends default audit capabilities to meet strict regulatory and internal compliance needs. This add-on preserves selected audit records for up to ten years, supporting long-running investigations and eDiscovery timelines.

Once enabled, authorized admins can search and access retained events in Microsoft 365 Compliance Center or programmatically via the Office 365 Management Activity API. Retention policies can be scoped to specific users or activities, helping optimize storage and cost while maintaining evidentiary integrity. The service supports immutable retention and advanced search to accelerate incident response and compliance reporting.

Ideal for regulated industries, this add-on helps align with governance standards by ensuring critical audit data remains accessible, reliable, and review-ready over extended periods.