Microsoft’s connectivity.office.com, a Microsoft 365 network diagnostic site used by administrators to test access to cloud services, began showing browser trust warnings after its TLS certificate expired on June 14, 2026, and remained unreplaced for roughly 35 hours as of Monday, according to...
certificate automation
certificate lifecycle management
enterprise it
microsoft 365
microsoft 365 connectivity
operational reliability
tlscertificatemanagementtlscertificates
