Microsoft announced that it has disrupted a Vanilla Tempest campaign whose goal was the deployment of Rhysida ransomware.

Microsoft on Thursday disclosed that it revoked more than 200 certificates used by a threat actor it tracks as Vanilla ...

The name on the security certificate is invalid or does not match the name of the target site webmail.domain.com. Outlook is unable to connect to the proxy Server ...

Tens of thousands of secure websites might start to display certificate errors to their visitors in January, when Microsoft plans to stop trusting 20 certificate authorities (CAs) from around the ...

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’s May Patch Tuesday update is triggering authentication errors. Microsoft is alerting customers that its May Patch Tuesday update is causing authentications errors and failures tied to ...

The Microsoft Exchange admin portal is currently inaccessible from some browsers after Microsoft forgot to renew the SSL certificate for the website. Starting at 8 AM EST today, Microsoft Exchange ...

Users around the world have had trouble accessing some HTTPS websites due to an error at GlobalSign, one of the world’s largest certificate authorities. As part of ...

Microsoft gave notice this week that currently used Transport Layer Security (TLS) certificates associated with Microsoft 365 services and Azure Communication Services "will expire in May 2025." In ...