Windows Email Outlook 365 Classic - 2025
Windows Email Outlook 365 Classic - 2025
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Latest Outlook Classic Updates & Milestones
February 24, 2026: Release of Version 2602 (Build 19725.20126), which improved how Outlook retrieves configuration for People experiences in Sovereign cloud environments.
February 10, 2026: A critical security update was deployed to fix a bug that prevented users from opening emails protected with the "Encrypt Only" label.
January 24, 2026: An Out-of-band (OOB) update was released to resolve a major issue where Outlook would hang or fail to open when using PST files stored in cloud-backed locations like OneDrive.
January 13, 2026: Deployment of KB5074109, which addressed high-priority connection and synchronization failures for users with POP account profiles.
November 11, 2025: Fixed a recurring issue where attaching a OneDrive file via a web add-in caused "Access Denied" errors for the recipient.