Microsoft Exchange users are urged to mitigate a zero-day vulnerability that CISA has confirmed is under active exploitation.

A single email, opened in a browser, is all it takes. Microsoft Exchange servers running Outlook Web Access (OWA) are being ...

Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come ...

Microsoft is investigating an ongoing outage preventing Outlook on the web users from accessing their Exchange Online mailboxes. According to thousands of user reports on DownDetector, the issue ...

Microsoft warned Exchange Server customers about critical OWA vulnerability CVE-2026-42897 affecting on-premises deployments.

Microsoft is investigating an ongoing outage blocking Exchange Online customers worldwide from accessing their mailboxes or sending/receiving emails. Affected users see "550 5.4.1 Recipient address ...

Microsoft has announced the public preview of its enhanced Message Trace feature in the Exchange admin center (EAC) for Exchange Online. A message trace provides visibility into emails sent to, from ...

After widespread complaints of blocked or sluggish email services, company says it has identified the problem and the ‘issue is resolved.’ Microsoft said Monday an outage that hit its Exchange Online ...

Microsoft's cross-platform Exchange Web Services (EWS) API will end on October 1, 2026. This change will affect Exchange Online customers utilizing EWS to access emails and contacts. EWS users who ...

It's finally time for businesses running Exchange Online to switch from Basic Authentication to Modern Authentication before Microsoft disables the former on October 1, 2022, according to the US ...