Teams channel auto-hiding even when conversations are active

Hi @Aravindraj Selvaraj, 

At this time, there is no further method to disable Teams channel auto-hiding globally across Microsoft Teams.   Channel auto‑hiding behavior is controlled by Microsoft Teams which Teams may automatically hide channels it determines to be inactive based on internal logic, and unfortunately, posting messages or mentioning users does not always force the channel to reappear reliably. 

Reference: Teams to Begin Automatically Hiding Inactive Channels | Microsoft Community Hub 

As my recommendation, the reliable path is to drive explicit notifications, here are a few steps that often help: 

1/ Use Tag mentions for critical alerts: 

Create an organization tag (e.g., @IT‑Alerts‑All) and add recipients. Tag mentions surface in the Mentions/Tag mentions views and drive notifications even when users have a busy channel list. 

Reference: Customize channel notifications in Microsoft Teams 

2/ Ask users to set channel notifications to Banner and feed for the Alerts channel 

Go to the channel > ⋯ > Channel notifications > Notify me for all new messages set to Show in Activity and banner and feed (optionally, they can choose include thread replies). 

This produces a desktop/banner alert in addition to Activity. 

3/ From See all your teams and channels, users can Show hidden channels and Pin the Alerts channel at the top of their list. (Admins/owners can’t force a permanent pin for everyone.) 

Reference: Show, hide, or favorite a channel in Microsoft Teams 

If this behavior is negatively affecting your workflow, the recommended next step is to submit feedback through the Microsoft Feedback Portal via this link: Microsoft Teams · Community so the product team can review the request and consider adding an administrative control in the future. 

In the meantime, I have found a similar post on the Microsoft Feedback Portal that describes the same issue: Disable Auto-Hiding Inactive Channels · Community, and I recommend that you upvote it so the product team can better understand the impact and prioritize further investigation. 

Note: Please understand that as a forum moderator, my primary goal is to provide helpful guidance and support through general troubleshooting steps. While I don’t have access to internal systems or test devices required to resolve backend/account issues, I truly appreciate your understanding of these limitations.  

I hope you find this information helpful. If anything is unclear, please don’t hesitate to reach out to me.