Microsoft rushes out another fix for cloud storage after January update

Microsoft dropped a weekend treat for administrators with yet another out-of-band update to deal with Outlook freezes and broken cloud storage.

The latest fix is for an issue introduced in the January 2026 Windows Security Update in which some applications that open or save files stored in cloud-backed locations could become unresponsive or display errors.

Microsoft gave its email client as an example. "Some installations of Outlook may also become unresponsive and fail to open when PST files are stored in cloud‑backed storage such as OneDrive."

The issue was initially thought to be a problem with classic Outlook POP account profiles, but Microsoft later acknowledged the bug was related to using cloud-backed storage and Outlook was not the only application affected.

The problem is compounded by the fact that, as a Security Update, uninstalling it while Microsoft addresses the bugs risks exposing systems to the vulnerabilities the patch was ...