We will begin rolling this out in early September 2020; we expect the rollout to be complete in mid-September.
How this will affect your organization:
Your end users will be able to configure notification settings through a simplified global notification settings page. They will also be able to choose from any two teams and channel notification presets or they can customize their channel notification settings.
The new settings can be accessed by selecting the profile picture at the top right corner of Teams, and then selecting Settings > Notifications."