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ERROR_SYNCHRONIZATION_REQUIRED
What this result means
ERROR_SYNCHRONIZATION_REQUIRED is a Windows system result. The local Security Accounts Manager data must be synchronized with the authoritative domain source before the requested operation can proceed.
Why it can appear
- replication is pending, blocked, or has failed
- the machine resumed from a stale snapshot or backup
- network, DNS, or time problems prevent contact with the authoritative controller
- a role transition or restore left local account data behind the domain state
Troubleshooting steps
- Collect SAM, Netlogon, Directory Service, replication, DNS, and time-service events
- Identify the authoritative controller and last successful synchronization
- Check secure-channel health and network reachability
- Record any restore, clone, rollback, or offline period
Correct recovery and handling
Restore domain connectivity and complete supported synchronization or recovery procedures. Do not edit SAM files manually or force local changes that can conflict with the authoritative copy.
Related and easily confused conditions
This is a consistency requirement, not simply a transient busy signal. Retrying is useful only after the underlying synchronization path is healthy.
References
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