Teams: several options
Office 365: several options
OneDrive: several options
Check out https://github.com/awesome-selfhosted/awesome-selfhosted
Office 365: several options
OneDrive: several options
Check out https://github.com/awesome-selfhosted/awesome-selfhosted
At least the overloads I have worked for don’t allow us access unless the machine is locked down so hard that it’s borderline unusable.