Posted inExchange Online Microsoft Purview

MC1472021: Outlook Mobile Adds Purview DLP Wait-on-Send Policy Support

3 minutesPosted inExchange Online, Microsoft Purview
MWPRO IMPACT SCORE
OPERATIONAL IMPACT
51
0 25 50 75 100
HIGH IMPACT • REVIEW RECOMMENDED
Recommended Action:
Review the update and plan any required actions before rollout.
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Primary Audience

Tenant AdminsMicrosoft 365 AdminsExchange AdminsSecurity TeamsCompliance TeamsIT ManagersService Owners
Why this score?
AI Confidence
HIGH
Enough detail is available to trust this assessment.
Assessment Reasoning
The announcement moves the rollout from late September to mid-November 2026, indicating a minor schedule adjustment. Admins need to review Purview DLP policies and optionally configure wait-on-send enforcement for Outlook mobile clients. The change improves compliance controls but requires planning and validation rather than urgent remediation. User effects are moderate as the feature influences email sending behaviour where enabled.
60
🛡️ Admin Impact
HIGH
45
👥 User Impact
MEDIUM
40
⚡ Urgency
MEDIUM
55
🔧 Effort
HIGH
ℹ️ WHAT YOU NEED TO KNOW
📌

AT A GLANCE

Outlook Mobile will soon support Purview DLP wait-on-send policies, letting admins control how long users wait for DLP checks before messages send.
👥

END USERS

Users may see a delay before emails send while policy checks complete.
🛡️

IT ADMINS

Review Purview DLP policies and decide if wait-on-send enforcement is appropriate for your organisation.
📅

ROLLOUT TIMELINE

Upcoming:
Mid-November 2026

📢 Official Microsoft Message Center Announcement

(Updated) [Outlook Mobile] Purview DLP Wait-on-Send Support
Message ID: MC1472021 (Updated)

Updated October 6, 2026: We have updated the timeline. Thank you for your patience. 

[What and why:]

Outlook for iOS and Android will support Microsoft Purview Data Loss Prevention \(DLP\) wait\-on\-send policies. Organizations can require a DLP evaluation before an email is sent and configure how long users must wait for policy evaluation to complete. This helps ensure sensitive information is inspected against organizational policies before messages leave the organization while providing administrators with flexible control over the user experience.

[Rollout schedule:]

General Availability (Worldwide, GCC, GCC High, DoD): We will begin rolling out in mid-November 2026 (previously late September) and expect to complete by mid-November 2026 (previously late September).

[Impact on your organization:]

This feature helps organizations reduce the risk of sensitive information being sent before Microsoft Purview DLP policies can be evaluated. Administrators can require users to wait for policy inspection and configure the maximum wait time based on organizational requirements. This improves policy enforcement and compliance while allowing organizations to balance security, performance, and user productivity.

[Action required / Recommendations:]

Administrators can review their existing Microsoft Purview Data Loss Prevention policies and determine whether wait-on-send enforcement is appropriate for their organization. To take advantage of this feature, administrators may enable and configure the desired wait period within supported DLP policies. No changes are required for organizations that do not plan to use wait-on-send enforcement.

Source: Microsoft Message Center • Analysed by MWPro

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