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E_SYNCENGINE_FOLDER_IN_REDIRECTION
The scope of E_SYNCENGINE_FOLDER_IN_REDIRECTION is Windows cloud-file and sync-engine infrastructure: the folder is currently being moved or redirected, so sync work must wait. Preserve 0x8802D00B beside the returning call before cleanup or retry creates a more generic secondary failure.
Read the boundary first
When it is returned, a Windows sync engine coordinates local NTFS objects, provider metadata, remote identifiers, quota and naming rules, placeholder hydration, network authentication, and asynchronous upload or download state. During a this result investigation, the same Explorer action can cross several of those boundaries, so diagnosis must retain the first failing stage rather than treating every code as a generic connectivity problem.
During a this result investigation, known Folder redirection, sync-root relocation, or provider-managed moves create a transitional namespace. Acting on old and new paths concurrently can duplicate or lose identity mappings.
The first owner to inspect is the local sync root, placeholder state, file-system operation, provider request, network exchange, account policy, or remote storage operation that produced the HRESULT.
Keep neighboring conditions separate
When it is returned, FOLDER_INACCESSIBLE is an access failure; FOLDER_IN_REDIRECTION is a temporary namespace transition.
Do not copy the tree manually while the managed redirection is active.
Incident record for this HRESULT
| Capture | Diagnostic value |
|---|---|
| Old and new folder identities for it. | This places the failure on the lifecycle or transaction timeline and helps test the Windows cloud-file and sync-engine infrastructure boundary. |
| Redirection operation and phase for it. | This separates caller input from environment and service state and helps test the Windows cloud-file and sync-engine infrastructure boundary. |
| Pending file operations for it. | This provides a stable comparison across retries or another machine and helps test the Windows cloud-file and sync-engine infrastructure boundary. |
| Provider generation and callbacks for it. | This identifies the exact object or resource generation involved and helps test the Windows cloud-file and sync-engine infrastructure boundary. |
Reproduce without destroying evidence
The investigation should change one variable at a time and keep the original failing sample.
- First: Pause new work for the affected subtree.
- Next: Track identity through file IDs and operation IDs.
- Then: Resume after redirection commits or rolls back.
- Finally: Reconcile events from both path generations.
Three useful controls
- Second supported path for the same stable item: for it, a changed result separates retained object, connection, path, host, or device state from the original input. Hold constant: for it, keep account, remote item version, and client build fixed.
- Reduced failing operation: If this result follows the reduced step, the rejecting transition is localized. Hold constant: for it, retain old and new folder identities and remove only unrelated work.
- Targeted corrective control: Use this as a diagnostic branch rather than a blanket workaround: pause new work for the affected subtree. Hold constant: for it, keep the original this result sample available for the final regression test.
Definition of done
Closure for it requires the redirection completes atomically and every item retains one authoritative identity and location; then repeat the next lifecycle operation to detect stale state.
Technical references
The references below define the API family or storage/protocol behavior used to interpret this result.
- Microsoft: Build a Cloud Files sync engine
- Microsoft: Determine cloud placeholder state
- Microsoft: Restrictions and limitations in OneDrive and SharePoint
- Microsoft: StorageProviderSyncRootManager
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