Microsoft releases second out-of-band fix for Windows in a week

"Outlook users have reported difficulties with Microsoft's January Patch Tuesday updates, forcing Microsoft, once again, to patch some of its patches. Users reported that, after applying the January 13 Windows updates, some applications became unresponsive or encountered unexpected errors when opening files from or saving files to cloud-based storage such as OneDrive or Dropbox. In particular, certain Microsoft Outlook configurations"

"Users reported that, after applying the January 13 Windows updates, some applications became unresponsive or encountered unexpected errors when opening files from or saving files to cloud-based storage such as OneDrive or Dropbox. In particular, certain Microsoft Outlook configurations with the PST file containing a users' messages stored on OneDrive could cause Outlook to hang or lead to sent messages going missing or previously downloaded emails being re‑downloaded."

After the January 13 Windows updates, some applications became unresponsive or showed unexpected errors when opening or saving files to cloud-based storage like OneDrive or Dropbox. Certain Microsoft Outlook configurations that store PST files on OneDrive could cause Outlook to hang, cause sent messages to go missing, or trigger previously downloaded emails to be re-downloaded. The problem affected Windows 11, Windows 10, and Windows Server installations in affected environments. Microsoft issued out-of-band emergency updates for Windows 11, Windows 10, and Windows Server 2019, 2022, and 2025 to address the issue and restore normal file access and Outlook behavior.

Read at Computerworld