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.

​Microsoft deprecated OWA Light as of August 19, 2024, and announced this week that the OWA Light experience will likely be ...

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 ...

Microsoft has confirmed that it will soon retire the original lightweight Outlook version from Exchange servers.

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 ...

The emergency patches for the recently disclosed critical vulnerabilities in Microsoft Exchange email server did not come soon enough and organizations had little time to prepare before en masse ...

Microsoft will disable OWA Light by default in the August 2026 Exchange Server update, redirecting users to standard Outlook ...

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 ...

Microsoft has identified one of the critical vulnerabilities in Exchange Server that the company disclosed in February's Patch Tuesday update as actually being a zero-day threat that attackers are ...

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 ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Microsoft confirms Exchange zero-day, CISA warns it's under active exploitation. Updated May ...