Investigate Snapshot Debugger uploader execution permissions separately from write access

Source facts

Microsoft associates UploaderCannotStartFromShadowCopy, often accompanied by UnauthorizedAccessException, with a reduced-permission application account. In the documented situation, that account can write to the shadow-copy folder but cannot execute code from it. The failed uploader launch therefore requires an execution-permission investigation. Microsoft Learn.

Applicability

Use this review only when the observed error matches the documented uploader-start condition. Identify the running application’s actual account, shadow-copy location and relevant execution controls. Keep this distinct from snapshot thresholds, exception reporting and network delivery failures.

DSE recommendation

DSE recommends collecting the precise error before proposing a permission change. Have the application and platform owners inspect the effective account and approved executable locations. Evaluate the source’s folder-override guidance for the actual deployment, and choose a narrowly scoped correction. Avoid broadening permissions for unrelated users or directories to make the symptom disappear.

Verification

Repeat a permitted snapshot exercise under the same application identity after the approved adjustment. Confirm uploader startup and the expected snapshot association, while also checking that unrelated identities retain their previous restrictions. Record sanitized paths, relevant access decisions and resulting telemetry. If the error persists, preserve the original evidence and move to the next documented diagnostic branch.

Official references

Microsoft Learn: Troubleshoot Application Insights Snapshot Debugger.