A Windows Server security update, to be exact.

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

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 has confirmed that this month's Windows Server security updates are causing OWA sign-in and mail delivery issues on some Exchange Server systems.

Users reported possible Microsoft Outlook problems on Downdetector, but Microsoft had not confirmed a new outage or provided details about affected regions and symptoms.

Say goodbye to .msix and .msixbundle files in your email (unless your admin whitelists them).

Snow day? Microsoft on Monday confirmed a widespread, multi-hour outage affecting Outlook users, leading to email delays and failures, authentication issues, and other problems. In a post on X, ...

Microsoft will begin retiring Exchange Web Services in Exchange Online on October 1, 2026. Older applications and email clients that rely on EWS may gradually lose access to Microsoft 365 email, ...

A calendar that doesn't sync properly can disrupt meetings, reminders, and daily schedules across multiple devices. Whether ...

An outage at Microsoft impacted thousands of online users on Monday as they attempted to use its Microsoft 365 service for emails, calendars and other features. Microsoft 365 confirmed early Monday it ...

Microsoft today began disabling Exchange Web Services (EWS) by default in Exchange Online, which will cut off the protocol that Apple's Mail, Calendar, Contacts, Notes, and Reminders apps on Mac still ...