Data Protection Issues

Fix Purview DLP Allow Override Dialog Not Appearing in Outlook

Camila Milosovich Sep 28, 2026 869 views

Question details

The user is experiencing an issue where an Outlook message containing a labeled file is blocked by a Microsoft Purview Data Loss Prevention policy, but the Allow Override dialog does not display.

Fix Purview DLP Allow Override Dialog Not Appearing in Outlook

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Sending an email with a labeled file that is protected by a Data Loss Prevention (DLP) policy.
Observed behavior: The message is blocked according to the DLP policy, but the expected Allow Override dialog fails to appear, preventing the user from intentionally bypassing the block.

Before you start

Ensure you have administrative access to the Microsoft Purview compliance portal and that your Outlook client is connected to a stable network to sync policy updates.

Solution 1Recommended

Verify DLP Rule Configuration and User Scope

Ensure the DLP policy is correctly configured in the compliance portal to allow overrides for the affected users.

Access the compliance portal

Navigate to policies

Go to 'Data loss prevention' in the left menu, then select 'Policies' to view your active DLP policies.

Edit the affected policy

Select the policy that is blocking the content and click 'Edit policy' to review its specific rules.

Check override settings

Locate the 'User notifications' section within the rule settings and ensure that the 'Allow overrides' checkbox is enabled.

Verify user scope

Check the 'Locations' and 'Conditions' settings to ensure the user experiencing the issue is explicitly included in the permitted policy scope.

Verify DLP Rule Configuration and User Scope

Policy Sync Time: Keep in mind that changes to DLP policies can take up to 24 hours to fully sync and apply to all Outlook clients across your organization.

Solution 2

Update Outlook Client and Check Audit Logs

Resolve intermittent dialog display issues caused by an outdated Outlook client or synchronization defects.

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Frequently Asked Questions

Why does my DLP policy block emails without showing the override option?

This typically occurs if the 'Allow overrides' setting is disabled in the specific rule within the Microsoft Purview DLP policy, or if the sender falls outside the permitted scope of that specific rule.

Can an outdated Outlook client affect Purview DLP notifications?

Yes, an outdated Outlook client might fail to properly render or synchronize policy tips and dialog boxes from the server, resulting in the Allow Override prompt not appearing.

How do I check if my DLP policy overrides are being logged?

You can check the Audit logs in the Microsoft Purview compliance portal. Search for DLP rule match events to determine if the override actions or forced blocks are being successfully recorded by the service.

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