October Windows Server updates may disrupt Exchange email. Learn which servers are affected, the symptoms, and Microsoft's ...

On Monday, Microsoft released the last major update for Exchange Server 2019. The aging Exchange Server is set to lose support on Oct. 14, 2025. This final update (2025 H1 Cumulative Update (CU15) ...

Microsoft released out-of-band Exchange Server security update that fixes a high-severity mailbox access vulnerability (CVE-2026-96940).

Microsoft patches CVE-2026-96940, which lets authenticated attackers read other users' Exchange mailboxes within the same organization.

Organizations running Microsoft Exchange Server face an active threat after a zero-day vulnerability was confirmed to allow attackers to silently take over inboxes, rewrite email content, and steal ...

You've done your due diligence and bought the right hardware for your move to Exchange Server 2016. After you put all the pieces together, then it's time for a thorough Exchange Server testing regimen ...

Exchange administrators still reeling from last month's flurry of fixes won't get much rest after Microsoft delivered four more fixes for the messaging platform on April Patch Tuesday. Microsoft ...

Exchange Server downtime is inevitable, especially when your organization relies on a standalone on-premises Exchange server. However, you can reduce the downtime in the event of a disaster if you ...

Cybersecurity researchers at ESET have identified at least 10 hacking operations scanning for Microsoft Exchange servers that are yet to be protected against recently discovered zero-day ...

The Cybersecurity and Infrastructure Security Agency (CISA) has instructed US government agencies with on-premise Exchange systems to run Microsoft malware scanners and report results by April 5. CISA ...

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.