Microsoft is unlocking the "Full Potential" of Private Channels in Microsoft Teams: What You Need to Know

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It has been a while since I posted something just about a Microsoft Teams update, as a lot have been Copilot in Teams to be honest. But here is a real Microsoft Teams update I think is worth knowing about, and it involves Security and Compliance as well. Microsoft is rolling out a "major" update to private channels in Teams, starting in late September 2025 and continuing through mid-December. This biggest change in this update is a shift in how private channel data is stored from individual user mailboxes to a dedicated channel mailbox. Not only will this simplifie compliance management, it will also and align private channels with shared channels, making governance and experience more consistent across Teams. This update promises to increase the support up to 1000 channels per team and 5000 members per channel, removing previous limitations. Teams will also allow meetings to be scheduled directly within private channels, enhancing collaboration.  For organizations using Micr...

Security enhancements in Microsoft Teams

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Collaboration Security for Microsoft Teams was announced back in March, but we are now seeing some of these features being released to customers subscribing to Microsoft Defender Plan 2.

Report suspicious chats or channels was one of these new features, and it should be rolling out during August. The feature is enabled by a new policy setting which is turned on by default. Admins can control this setting in the "messaging policies" in the Teams admin center.

Other features controlled by new policy settings are "URL blocking" and "ZAP protection".