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NS_E_PDA_SYNC_FAILED
The synchronization generation finished with failures
NS_E_PDA_SYNC_FAILED (0xC00D1237) is an overall sync result. It tells you that the generation did not complete successfully, but the actionable cause is normally an earlier per-item, account, device, or conversion error.
Use the summary to find the first specific failure
Record sync generation ID, counts of succeeded/failed/skipped items, terminal device state, and the first HRESULT attached to a failed queue item. Do not troubleshoot this aggregate code without the item list.
Close the incident correctly
Correct the first specific failure and rerun the same selection. A clean run should complete without this aggregate result. If a different item fails, preserve that new item-level code; repeatedly retrying the entire queue without identifying the first failure only changes ordering and hides the root cause.
Technical references
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