Several Outlook users have reported the error Cannot start Microsoft Outlook window, Invalid XML, which they encounter while trying to start Microsoft Outlook on ...

Microsoft is working to address a known issue affecting Outlook for Microsoft 365 customers, causing slow starts and freezes as if Offline Outlook Data Files (OST) are being synced right after launch.

Microsoft is investigating a known issue that triggers Outlook errors when opening encrypted emails sent from other organizations. According to a recently published support document, this issue ...

Microsoft confirmed that a configuration change error triggered a major outage on October 29, disrupting Azure, Microsoft 365 ...