Disable Teams Created by Office 365 Groups

Hi,

There is not possible (AFIK) to disable Teams for a Microsoft 365 Group that have Teams enabled. It is requested in this uservoice request:

Delete Team without deleting Office Group – Microsoft Teams UserVoice

It is not possible to convert a Microsoft 365 Group to a Distribution List (looks like it that you want), that request been declined in a uservoice request:

Allow conversion of 365 groups back to distribution lists. – Customer Feedback for Microsoft Office 365 (uservoice.com)

So what you could do is to delete your old M365 group and create a new without enabling Teams, or create a simple distribution list.

Create a group in the admin center - Microsoft 365 admin | Microsoft Docs

Create distribution groups - Microsoft 365 admin | Microsoft Docs