Teams creates a Power BI Group without my permission whenever a user with a Power BI license logs into Power BI Service
Here's the scenario:
1. An Office 365 user is a member of several Teams groups
2. The user logs in to Power BI Service for the first time
3. The groups that the user is a member of is automatically created as Groups in Power BI
This is currently preventing an enterprise-wide rollout of Power BI because of the inability to control governance over creation of workspaces.
It bypasses the Power BI Tenant Setting that only allows certain groups of users to create Power BI Workspaces or Groups (https://powerbi.microsoft.com/en-us/blog/announcing-new-workspace-experience-general-availability-ga/). Now anyone who is a member of a Teams Group can "create" a Power BI Group/Workspace, allowing them to share content without governance.
Other Power BI administrators are having the same issue here: https://microsoftteams.uservoice.com/forums/555103-public/suggestions/36612928-ability-to-turn-off-power-bi-workspaces-when-team