Teams Private Channels Just Got Powerful: 1,000 Channels, 5,000 Members & Compliance Simplified

Microsoft Teams Private Channels just got a major upgrade — bigger limits, meeting scheduling, and a simpler compliance model aligned to Microsoft 365 group mailboxes. 🚀

Here’s the key takeaways for IT leaders and Teams admins:

• Scale up: up to 1,000 private channels per team and 5,000 members per private channel.
• Meetings supported in private channels.
• Compliance simplified: private channel messages now live in the team’s M365 group mailbox, aligning DLP, Retention, eDiscovery, and Legal Hold across channel types.
• Migration timeline: worldwide rollout started in Oct–Dec 2025, with a PowerShell cmdlet to track status: Get-TenantPrivateChannelMigrationStatus.

Admin checklist

1. Add your Teams’ M365 group mailbox to Purview DLP/eDiscovery/Retention scopes.
2. Verify Teams channel messages retention applies across standard/shared/private.
3. During migration, ensure searches/holds include both group and user mailboxes.
4. Monitor progress with the cmdlet above.

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