Windows
Excel trust issue caused by Group Policy blocking trusted locations
Excel was showing a trust issue on a file that had worked before. The Excel policy settings were changed back to Not Configured so Group Policy would stop blocking trusted locations.
Killed once by someone from XL.net, on 2025-12-02.
Affects
Versions
- Windows
Apps
- Microsoft Excel
What you see
- Excel reports a trust issue when opening a workbook that had been used before.
- Trusted locations could not be added in Excel while the policy settings were in place.
Why it happens
Likely Group Policy was likely enforcing Excel trust settings that prevented trusted locations from being added.
When it shows up
Excel shows a trust issue and trusted locations are blocked by policy on a machine in the affected policy scope.
You are in this case if:
- Excel trust-related policy settings are present in Group Policy instead of being Not Configured.
- Excel will not allow trusted locations to be added because policy control is overriding the Trust Center settings.
1 fix below
The steps that killed it
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Someone from XL.net killed this on a Windows computer on 2025-12-02. It is written up from that one repair, so it cites no outside page.