Topic starter
11/05/2026 8:59 pm
TL;DR: One in five exposed enterprise secrets originated in SharePoint, according to Entro Security, where OneDrive Known Folder Move can silently sync Desktop and Documents files into tenant-wide cloud libraries and widen access well beyond the file owner. Convenience features become identity and secrets governance problems when local files are treated as if they remain local.
Editorial analysis by NHI Mgmt Group, based on content published by Entro Security: “SharePoint to SecretPoint: Microsoft Auto-Sync Exposes Secrets at Scale”.
By the numbers:
- The OneDrive sync client is enabled by default on Windows 10 and 11, according to Entro Security research.
Key questions
Q: What breaks when local files are auto-synced into SharePoint?
A: The assumption that workstation files remain workstation-bound breaks first.
Q: Why does SharePoint auto-sync increase the blast radius of a compromised account?
A: Because the account no longer protects only email or SaaS access.
Q: What signs suggest synced file repositories are becoming a secrets problem?
A: Look for a growing volume of .env, .json, .pem, .xlsx, and script files in SharePoint-backed libraries, especially when those files contain token, password, or key keywords.
Practitioner guidance
- Disable or restrict KFM where it is not required Review whether Desktop and Documents need to sync at all.
- Harden Microsoft 365 admin paths Limit who can elevate to site collection administrator and who can search across synced libraries.
- Scan collaboration storage for secrets Extend secrets detection to SharePoint, Teams-linked libraries, and synced user folders.
Bottom line: OneDrive auto-sync can quietly convert local working files into enterprise-readable secret stores, which makes convenience settings part of the identity security surface.
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This topic was modified 6 days ago by NHI Mgmt Group
11/05/2026 8:59 pm
Auto-sync creates trust debt in file governance: The organisation assumes that local files remain locally bounded until a user deliberately shares them, but OneDrive KFM breaks that premise by moving content into a tenant-managed collaboration layer. That means the governance problem begins before sharing and before incident response. Practitioners need to treat automatic sync as a trust boundary change, not a convenience setting.
A few things that frame the scale:
- 91.6% of secrets remain valid five days after the targeted organisation is notified, showing a critical gap in remediation procedures, according to the Ultimate Guide to NHIs.
A question worth separating out:
Q: Should security teams disable OneDrive auto-sync by default?
A: They should disable or restrict it where the business does not need continuous folder backup. If the organisation keeps the feature, it should be paired with policy controls, user awareness, and secret scanning. The decision depends on risk tolerance, but default enablement without governance is a poor control posture for sensitive environments.
👉 Read our full editorial: SharePoint auto-sync can turn local files into tenant-wide secret exposure
This post was modified 6 days ago by NHI Mgmt Group