Microsoft 365 Access Denied? Why You Can’t Sign into Microsoft 365 Apps (and How to Fix It)
Updated August 2025. Originally published September 2022. Microsoft 365 is the backbone of modern work for over one billion users worldwide. From Microsoft Teams, OneDrive, Outlook, and SharePoint, these cloud-based tools keep businesses connected and productive. But when you’re suddenly denied Microsoft 365 access or access/performance is unstable, frustration can spike fast — especially […]