New data suggests someone has compromised more than 21,000 Microsoft Exchange Server email systems worldwide and infected them with malware that invokes both KrebsOnSecurity and Yours Truly by name.

The Cybersecurity and Infrastructure Security Agency (CISA) and the National Security Agency (NSA) have released guidance to help IT administrators harden Microsoft Exchange servers on their networks ...

Microsoft on Thursday cleared up the mystery surrounding its next Exchange Server release plans, as described in an "Exchange Server Roadmap Update" announcement. Like SharePoint Server and Project ...

There are still thousands of cyberattacks targeting zero-day security vulnerabilities in Microsoft Exchange Server every single day as cyber criminals attempt to target organisations that have yet to ...

For most companies, Microsoft Outlook is the default email service within the network because it automatically configures itself with the Exchange server that manages all the email accounts in the ...

Simple mail transfer protocol, post office protocol and Internet message access protocol are technologies used to send and receive emails. These services can be enabled in Microsoft Exchange to enable ...

Just weeks after the disclosure of a series of critical zero-days in Microsoft Exchange Server caused consternation in the cyber community, Microsoft has patched four new vulnerabilities in the same ...

This article provides possible solutions to the problem in which Outlook cannot connect to the Exchange mailbox. This issue occurs when a user moves his mailbox from one Microsoft Exchange Server to ...

Tens of thousands of US-based organizations are running Microsoft Exchange servers that have been backdoored by threat actors who are stealing administrator passwords and exploiting critical ...

Cybersecurity responders are working around the clock to shore up networks hit by last week's hack of Microsoft's Exchange email service — an attack that has impacted hundreds of thousands of ...