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 ...

Email security provider Mimecast says it has been informed by Microsoft that a certificate it issued for authentication of Mimecast Sync and Recover, Continuity Monitor, and IEP products to Microsoft ...

A security certificate issued by Mimecast Services Ltd. that’s used to authenticate some of the company’s products with Microsoft Corp. 365 Exchange Web Services has been hacked. The certificate, ...

How to create a self-signed digital certificate for VBA macros in Office 365 Your email has been sent Macros in Microsoft Office are blocked for security reasons, but ...

Microsoft Virtual Training Days offer free classes for everyone. Fundamentals classes for beginners cover foundational concepts, terms, and capabilities, while technical courses provide a journey to ...

Microsoft in January patched a severe Office 365 vulnerability that exposed accounts whose domains were configured as federated. A severe vulnerability in the way Microsoft Office 365 handles ...

Email management provider Mimecast said that hackers have compromised a digital certificate it issued and used it to target select customers who use it to encrypt data they sent and received through ...

Microsoft Teams, the collaboration platform that competes with Slack, has been down since about 8:30 am ET. Microsoft reports the outage was due to an expired certificate. Microsoft first posted on ...