An error occurred while saving the commentCody commented
Office 365 Pro Plus GPOs, found here: https://www.microsoft.com/en-us/download/details.aspx?id=49030
These include the GPO for Microsoft Teams. Once the templates are in place,
User Config > Policies > Admin Templates > Microsoft Teams > "Prevent MS Teams from starting automatically after installation"
I just put this in my environment and it has remedied the issue.
***The date on the templates say Sept 25, 2019***