Teams Information barriers for external users

Hi Sankaperera,

unfortunately, information barrier groups cannot be created across tenants.

For external access with other Microsoft 365 organizations, you can allow all domains (the default) or you can restrict external access by allowing or blocking specific domains, by blocking all domains (which turns external access off) or by limiting which users can use external access.

Use guest access and external access to collaborate with people outside your organization - Microsoft Teams | Microsoft Learn