Priority Cleanup V2: Faster, Simpler Data Purging for Exchange Online

Enhancements Achieved with Exchange Priority Cleanup V2

Priority Cleanup (Use priority cleanup to expedite the permanent deletion of sensitive information from mailboxes | Microsoft Learn) was introduced to provide administrators with a powerful tool for permanently deleting mailbox content, even when under retention or eDiscovery hold, to address scenarios such as data spillage and urgent removals. Priority Cleanup addressed a key need in Exchange Online by allowing hold overrides. Through real-world use, we received valuable insights regarding the approval process, deletion speed, and reviewer experience. These learnings have guided our ongoing enhancements, ensuring that the solution evolves to better meet customer needs for efficiency and ease of use while maintaining robust security and compliance standards.

What's New in Priority Cleanup V2

Priority Cleanup V2 is currently in the planning stage. We’re sharing the proposed updates early to gather feedback before we begin implementation. The goal is to address the core limitations of V1 with enhancements focused on speed and simplicity.

Faster Data Deletion & Simplified Approval Workflow: We’re proposing to streamline the process to two key checkpoints:

1. Policy enforcement approval when moving from simulation to active mode (requires approval from a different Priority Cleanup admin).
2. We’re proposing to minimize approval overhead by removing unnecessary review stages. Disposition review by eDiscovery admins will be required only for mailboxes under eDiscovery hold. For other mailboxes, items will be permanently deleted soon after the Priority Cleanup policy is applied to speed up processing from days to hours. This would reduce the number of required users with admin privileges from four to two.

Controlled Purge Limits: 

Administrators will be able to efficiently manage substantial purges by securely processing deletions in batches, with a configurable limit of up to 100 items per mailbox per ELC run. A default limit of 100 items is applied, with the ability to adjust this value through an organization‑level configuration. This configurable limit provides an additional safeguard for system operations while offering flexibility to meet varying organizational needs.

Note: A default limit of 100 items will apply, with the ability to adjust this value via an organization-level configuration.

V1 vs V2 Feature Comparison

Proposed Improvements in Admin Experience and Control

1. Streamlined Policy Management: We are considering making policies easier to enable or disable directly from the main list view, potentially through a simple toggle, so administrators would no longer need to use the setup wizard for this task.
2. Enhanced Review Interface: Proposed updates include adding new, informative columns to the interface, such as a dedicated Mailbox/Site column to help identify the source location. We are also looking at providing clearly labeled date fields to indicate when items were received or created, which would replace the potentially confusing ExpiryDate label.
3. Comprehensive Audit Trails: It is proposed that every action would be thoroughly documented with a unique Cleanup ID. This ID could then be used in Audit Search to locate all events related to a specific cleanup operation, helping to simplify verification and post-incident analysis.

Note: Priority Cleanup V2 enhancements are specific to Exchange Online. These changes do not affect Priority Cleanup for OneDrive and SharePoint (PC ODSP), including its rollout timelines or behavior.

Key Benefits for Administrators

Priority Cleanup V2 delivers tangible improvements across the entire data purging workflow.

1. Accelerated Deletion: Requests for data removal are fulfilled much faster, enabling urgent incidents to be resolved within hours rather than days, and minimizing risk exposure.
2. Reduced Administrative Overhead: Coordination requirements are simplified, decreasing the number of users involved from four to two in most cases, which makes Priority Cleanup V2 more practical for smaller teams.
3. Enhanced Transparency: Improved user interface labels and robust audit logs help administrators clearly understand what data is being deleted and who authorized the action.
4. Maintained Security and Compliance: Segregation of duties is preserved so that no single individual can delete protected content alone, supporting security and compliance requirements.

Availability and Rollout

Priority Cleanup V2 is currently in development with rollout planned for the end of 2026. As with all Exchange Online features, we will publish a Microsoft 365 Roadmap item and send Message Center notifications to affected tenants before general availability

We Want Your Feedback

Priority Cleanup V2 represents a significant evolution based on customer feedback from V1 users who emphasized the need for faster, simpler data purging without compromising security. We've addressed the core pain points around speed, approval complexity, and admin experience, but we know there's always room for improvement.

We'd love to hear your thoughts: Does the simplified approval workflow meet your security requirements?  What visibility or reporting capabilities would make you more confident in using Priority Cleanup for urgent data removal scenarios?

Your feedback directly shapes how we prioritize future enhancements. Please share your experiences and suggestions through your regular Microsoft support channels or customer success contacts. Together, we can continue refining Priority Cleanup to better serve your data governance needs.

Aniket Gupta, Mehul Kaushik, Victor Legat & Purview Data Lifecycle Management Team