From Microsoft Corporation
MC215375, Stay Informed, Published date: Jun 6, 2020
We are making it easier for your users to focus on relevant information in Teams by removing some system messages.
When this will happen
- Rollout for standard release tenants will begin in mid-June and be complete in mid-July.
- Rollout for government tenants should begin in mid-August and be complete by the end of August.
How this will affect your organization
System messages, e.g., who has been added or removed from a team, will no longer be posted to the Channel pane. This will not affect compliance logs. What you need to do to prepare
Review the changes and assess the impact for your organization. Additionally, you may consider updating your training and documentation as appropriate.