Manage Your License Activations, Clean up Document Versions and More in Sharegate
https://en.share-gate.com/blog/manage-license-activations-clean-document-versions
https://en.share-gate.com/blog/manage-license-activations-clean-document-versions
https://techcommunity.microsoft.com/t5/Microsoft-Teams-Blog/New-admin-controls-for-apps-in-Teams/ba-p/78975
https://joannecklein.com/2017/08/01/office-365-sharepoint-app-site-titles/
http://www.sharepointtalk.net/2017/07/overview-of-shared-with-externals-and.html?m=1