Computer Configuration > Administrative Templates > Microsoft Office 2016 (Machine) > Updates
Machine
HKLM\software\policies\microsoft\office\16.0\common\officeupdate
This policy setting allows you to control whether Microsoft Teams is installed with a new installation of Office or when an existing installation of Office is updated. Note: This policy setting only applies to versions of Office, such as Microsoft 365 Apps for enterprise, where Teams is installed with a new installation or an update of Office. If you enable this policy setting, Teams won’t be installed with a new installation or an update of Office. If you disable or don’t configure this policy setting, Teams will be installed as part of a new installation or an update of Office, unless you have used some other method, such as the Office Deployment Tool, to exclude the installation of Teams.