Learn how to quickly and securely block a user from signing in to Office 365 (Microsoft 365) using both the Admin Center and PowerShell. This step-by-step tutorial covers disabling user access, unblocking accounts, and important best practices to follow before restricting sign-in. Perfect for Office 365 admins, IT professionals, and beginners managing user security and access control. Visit Here: https://youtu.be/-uwJBWKcPwA