Using Teams as Admin Hub in Schools

Hi Marius

We migrated all file shares to Files within Teams for 12 schools with 600 teachers.

There will always be risks involved when allowing access to data externally, whether it's email on a mobile device, remote access to the office or data in a cloud service, so you will have to consider accessibility and usability up against security and risks.

Personally I think the most important job to prevent data leakage is educating your users. If you find that you need further security measures look into enabling https://blogs.technet.microsoft.com/skypehybridguy/2017/09/01/microsoft-teams-manage-it-using-mobile-application-management-mam/ (Mobile Application Management) or https://blogs.technet.microsoft.com/skypehybridguy/2017/08/31/microsoft-teams-restrict-usage-with-azure-ad-conditional-access/.