Windows 11 / Intelligence workspace
Snapshot · 2026-10-25
IssuesKB5074109Evidence
Windows update intelligence

Apps become unresponsive saving to cloud-backed storage

Applications including Outlook could become unresponsive when saving files to cloud-backed storage, such as PST files stored on OneDrive.

ResolvedC3 · Microsoft confirmedMajor impactSnapshot checked 2026-10-25

Does this match your environment?

Windows scope
24H2 / 25H2
Architecture
Unknown — not universal
App / driver
Outlook / OneDrive
Conditions
Applications saving to cloud-backed storage; Outlook with PST files on OneDrive is the documented example.

A matching version is only a starting point. This page does not diagnose an individual device.

Evidence & current resolution

Microsoft lists this scope as resolved on 2026-01-23. Resolving update: KB5078127.

Microsoft official evidence
Evidence ID
official-cloud-storage-hangs
Source groups
1 · official publication
Evidence basis
Manually reviewed public source; no independent device test
Evidence permalink

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Recorded timeline

2026-01-13

Originating update released

KB5074109
2026-01-23

Official resolution recorded

KB5078127

2026-10-25

Snapshot reviewed

Added to this curated collection. Earlier acknowledgement time was not independently captured.

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