News ConnectWise Cloud Backup Breach: How a Vendor Credential Opened Microsoft 365 Tenants by Rebecca Sutton October 19, 2026 by Rebecca Sutton October 19, 2026 An attacker used a credential for ConnectWise’s Cloud Backup app to sign in to Microsoft 365 tenants one by one. Here is what happened and the checks to run this … FacebookTwitterLinkedinEmail