Turning off Planner Notifications for everyone when a new Planner is created

Hi, jumping in on an old thread as I ran into the same issue and couldn't find a solution.

From what I found, the only way to stop that mass notification from being sent is to have more than 50 people in the Team.

"For plans associated to groups with more than 50 members, this email is not sent."

For reference: https://support.microsoft.com/en-us/office/stay-updated-with-notifications-in-planner-f6a32f83-058d-4f39-988d-8a2e932820ec

I have the same issue, and it appears that there isn't a way to prevent notifications to everyone in the group when a new plan is created. I now only create new plans within a group when I absolutely need to, and before I do, I send a message to the entire team letting them know a new plan is being created, with some detail of who will use it. This is messy, but it helps alleviate any annoyance that the group members have with receiving these notifications. Another option is to create a new Teams Group for the intended project team members. 

Hey Lisa

Please follow this steps 

Go to Microsoft Planner:

Open Planner via the web or Microsoft Teams.

*Access Notification Settings:

Click the gear icon (Settings) in the top-right corner.

Select Notifications from the dropdown menu.

*Enable Task Assignment Notifications:

Check the box for “Send me an email when a task is assigned to me.”