Improving Activity Explorer load performance with updated default time range

Introduction

We are improving the Activity Explorer experience in Microsoft Purview to deliver faster load times and a more responsive interface. To optimize performance—especially for organizations with high activity volumes—the default time range will change from 7 days to 1 day when Activity Explorer first loads. This update reflects common investigation patterns where recent activity is most relevant, while preserving full access to historical data through filters.

When this will happen:

General Availability (Worldwide): We will begin rolling out in early May 2026 and expect to complete by mid-May 2026.

How this affects your organization:

Who is affected: Admins and analysts who use Activity Explorer in Microsoft Purview

What will happen:

• The default view has been updated to 1 day of data to improve performance and load times.
• Users can adjust the date range filter at any time to view up to 30 days (no change from existing support).
• The change is enabled by default for all tenants.
• Improved page load performance and responsiveness, particularly in high-volume environments.
• No changes to:
  • Data retention policies
  • Query capabilities and filtering options
  • Available insights and activity data

What you can do to prepare:

No action is required.

We recommend that you:

• Inform admins and investigators that Activity Explorer now defaults to 1 day of data to improve performance.
• Clarify that this is a UI default only and does not affect data availability.
• Remind users they can expand the date range (for example, back to 7 days or more) using the filter when investigating activity.
• Update any internal documentation or training materials that reference the previous 7-day default view.

Compliance considerations:

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