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

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...

Cross posting in multiple channels

Here is another feature that has been in the works for a while, and I know a lot of customers who have been waiting for this: Cross porting of messages in multiple channels in multiple teams.

It easy to use, and accessed through the "rich text" button on the bottom left when you create a new message. Then select your channels in the "select channels" button.

Be aware though, once these are posted, there is for now no way to see which channels you have posted the message in, and there is no aggregated view of all the comments in the different channels, they have to be monitored individually for now.

This is the M365 roadmap ID 52393 and should reach all tenants by the end of this month.