Microsoft Teams Retention Policy Configuration in Microsoft Purview Field Details Document Type Microsoft Teams Retention Policy Configuration in Microsoft Purview Applies To Microsoft Purview &  Microsoft Teams Audience MS Teams Administrator / IT Engineer Author AK. Udofeh Last Updated June 2026 Overview This configuration implements a Microsoft Teams retention policy using Microsoft Purview Data Lifecycle Management to automatically retain and delete Teams chat and channel messages after a defined retention period. The policy helps organisations: • Align with data governance and retention requirements • Reduce unnecessary long-term data storage • Support GDPR data minimisation principles This implementation applies retention to: • Teams 1:1 chats • Teams group chats • Teams meeting chats • Teams channel messages Once the retention period expires, messages are automatically deleted and are no longer recoverable through standard user access or Data Subject Access Requests (DSARs). Prerequisites Required licensing: • Microsoft 365 A3/A5 or E3/E5 equivalent licensing • Microsoft Purview Data Lifecycle Management access Required roles and permissions: • Compliance Administrator or • Purview Data Lifecycle Management Administrator Dependencies: • Microsoft Teams enabled in tenant • Microsoft Exchange Online enabled • Microsoft Purview portal access Preparation tasks: • Review existing retention and eDiscovery policies • Confirm no conflicting legal hold requirements exist • Prepare user communications prior to go-live Step 1: Access Microsoft Purview Open the Microsoft Purview portal: https://purview.microsoft.com Sign in using an administrative account with appropriate permissions. From the left-hand navigation pane, select: Solutions > Data lifecycle management > Retention policies Select: New retention policy Step 2: Configure Policy Scope Enter a policy name. Recommended naming convention: Teams Chat Retention – 2 Years (enter the number of years that Teams messages will be retained before deletion.) Optionally provide a description including: • Business justification • Approval reference • RFC number • Implementation date Example: Retains Teams chat and channel messages for 2 years in alignment with institutional data retention policy. Select: Static Continue to location configuration. Step 3: Target Resources / Components Select the following Microsoft 365 locations: ✅ Teams chats ✅ Teams channel messages Recommended scope: • All users (enterprise-wide deployment) Optional phased rollout: • Select specific pilot users or groups during testing phase Important: This configuration targets: • Teams 1:1 chats • Group chats • Meeting chats • Channel conversations This policy does NOT apply to: • Teams meeting recordings • SharePoint files • OneDrive files • Email retention These workloads require separate retention policies. Step 4: Configure Retention Settings Choose: Retain items for a specific period Configure retention duration: 2 Years Start retention based on: When items were created Recommended rationale: Using creation date ensures predictable and consistent lifecycle management and prevents indefinite retention caused by message edits. After the retention period: Delete items automatically Review the policy summary carefully before proceeding. Recommended configuration: • Retain content for 2 years • Automatically delete after expiry Step 5: Access Control / Enforcement Policy enforcement is handled automatically by Microsoft Purview once deployed. Important operational notes: • Users cannot bypass centrally managed retention settings • Messages deleted after expiry are permanently removed from standard access • eDiscovery or Litigation Hold policies override deletion where applicable Why this matters: This ensures: • Consistent organisational retention enforcement • Reduced data sprawl • Improved compliance posture • Controlled information lifecycle management Step 6: Testing / Report Mode Recommended safe rollout approach: Phase 1:  Pilot Deployment Deploy policy to: • IT administrators • Small pilot group • Test accounts Validate: • Messages remain accessible during retention period • Older content is identified correctly • No unexpected user impact occurs Perform test exports using Microsoft Purview eDiscovery. Validate: • Teams chats can be searched • Export formats are usable • Retention scope behaves as expected Suggested test scenarios: • 1:1 chat retention • Group chat retention • Meeting chat retention • eDiscovery export validation Important: Retention processing may take several days to fully apply due to Microsoft background processing. Step 7:  Monitoring & Validation Monitoring locations: Microsoft Purview Portal: Solutions > Data lifecycle management > Retention policies Validation checks: • Policy status shows enabled • Locations are correctly assigned • No policy errors present Additional monitoring: • Review Purview audit logs • Validate Teams message lifecycle behaviour • Confirm retention processing completion Expected behaviour: • Messages older than retention threshold become unavailable • Users lose access to expired messages • Content becomes unavailable through standard retrieval methods Troubleshooting indicators: • Policy not applying after several days • Users outside expected scope • Retention conflicts with existing compliance policies   Step 8: Enforcement / Go-Live Expand policy scope to all required users. Confirm organisational communications have been issued. Important Considerations • Teams chat retention does not automatically apply to Teams meeting recordings • Recordings stored in OneDrive or SharePoint require separate retention configuration • Deleted messages cannot be recovered once permanently removed • Data Subject Access Requests cannot retrieve deleted content after retention expiry • Litigation Hold or eDiscovery Hold overrides retention deletion • Retention processing is not immediate and may take several days Potential operational impact: • Users may lose access to historical conversations • Teams should not be used as a long-term records repository Operational recommendations: • Store important records in SharePoint or approved document systems • Avoid relying on Teams chat for permanent record keeping • Validate eDiscovery export functionality periodically Summary This implementation deploys a Microsoft Teams retention policy through Microsoft Purview to retain Teams chat and channel messages for a defined period before automatic deletion. The policy supports: • Data minimisation • Compliance requirements • Reduced long-term data exposure • Consistent lifecycle management across collaboration platforms Once enforced, Teams chat content exceeding the retention period is automatically and permanently deleted in accordance with organisational policy.