Email security company Mimecast has disclosed today that a "sophisticated threat actor" compromised one of the certificates the company issues for customers to securely connect Microsoft 365 Exchange ...

The certificate used to authenticate Mimecast’s Sync and Recover, Continuity Monitor and Internal Email Protect (IEP) products to Microsoft 365 has been compromised by a sophisticated threat actor. A ...

Microsoft Sharepoint and OneDrive for Business were briefly interrupted today after a German TLS certificate was mistakenly added to the main .com domains for the Microsoft 365 services. At ...

Microsoft is tightening security by introducing mandatory multi-factor authentication (MFA) for Microsoft 365 admin center access starting next month and ...

Microsoft's Entra service for identity management and access control (Identity and Access Management, IAM) currently relies on certificates based on DigiCert Global Root G1. The manufacturer has now ...