💡 Our Technical Review in summary
Summary
Microsoft is introducing a native Slack-to-Microsoft Teams migration tool within the Microsoft 365 Admin Center (MC1213779). This tool is designed to streamline the transition from Slack by allowing administrators to migrate content from public and private Slack channels directly into Microsoft Teams shared, public, or private channels. The rollout is scheduled to begin in late January 2026, with General Availability expected to complete by early March 2026.
Impact
- Administrative Access: A new entry will appear under the “Migration and imports” section of the Microsoft 365 Admin Center.
- Functional Scope: The initial release is limited to Slack channel content only. Migration of other Slack content types (such as Direct Messages) is planned for future updates.
- Migration Workflow: Admins will be able to upload Slack export files, select specific workspaces, and monitor the execution status of migration tasks through a centralized dashboard.
- Channel Mapping: The tool supports the migration of Slack channel content into various Teams channel types, ensuring continuity of historical data and collaboration.
- Default Availability: This feature will be enabled by default for all Microsoft 365 administrators; no manual opt-in is required.
Action Required
- Review Documentation: Familiarize your IT team with the “Migrating from Slack to Microsoft Teams” documentation on Microsoft Learn to understand the technical prerequisites.
- Inventory Assessment: Audit existing Slack workspaces and channels to identify which content is eligible and necessary for migration.
- Prepare Export Files: Ensure that your Slack workspace administrators are prepared to generate the required export files for use in the new migration tool.
- Update Internal Teams: Inform IT support and helpdesk staff about the new tool so they can prepare for potential migration projects starting in late January 2026.
- Timeline Monitoring: Monitor the Microsoft 365 Admin Center in late January for the appearance of the tool to begin testing the migration workflow.
Microsoft Official Update
Service: N/A
Category: stayInformed
Severity: normal
Updated January 13, 2026: We have updated the timeline. Thank you for your patience.
[Introduction]
We’re introducing a new Slack to Microsoft Teams migration tool to help organizations seamlessly transition collaboration from Slack to Teams. This tool enables administrators to migrate content from Slack public and private channels into Teams shared, public, and private channels, reducing complexity and improving continuity.
[When this will happen:]
- Targeted Release: Rollout begins in late January (previously early December) and completes by late January 2026.
- General Availability (Worldwide): Rollout begins in late January 2026 and completes by early March 2026.
[How this affects your organization:]
Who is affected: Microsoft 365 administrators managing Teams and Slack migrations.
What will happen:
- A new Slack to Teams migration tool will appear in the Migration and imports page of the Microsoft admin center.
- Admins can:
- Review Slack channels eligible for migration.
- Migrate Slack channel content to Teams channels.
- Initial release supports Slack channel content only; future updates will expand to other Slack content types.
- No changes to existing Teams functionality.
- Feature is available by default; no opt-in required.
Screenshot 1: On the setup page, users can specify a Slack export file and select a workspace to migrate.
Screenshot 2: On the migration page, users can run migration tasks and monitor their execution status.
[What you can do to prepare:]
- No action is required before rollout.
- If planning a migration:
- Review Slack channels for migration readiness.
- Communicate this change to IT and helpdesk teams.
Learn more: Migrating from Slack to Microsoft Teams – Microsoft Teams | Microsoft Learn
[Compliance considerations:]
No compliance considerations identified; review as appropriate for your organization.
