Microsoft Teams new chat and channels AMA (Ask Microsoft Anything)

The new experience has user level configuration to get to a preferred state, and not admin controls.

There is no change to how retention policies apply to chats and channels.

Can you share more Lindsay on why this will be confusing? The experience is designed to help users stay on top more effectively, and leverage chats and channels appropriately - put durable collab in channels and use chats for transient discussions. Consistent with how your organization is using retention policy.