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ERROR_GUID_SUBSTITUTION_MADE
What ERROR_GUID_SUBSTITUTION_MADE means
Translation completed with a fallback mapping. Security is not weakened by the substitution, but the resulting SID can be more restrictive than the administrator expected and may not match identities generated under another mapping policy.
Where it appears
- identity translation in distributed or directory-backed security
- migration of objects carrying GUID-based principals
- ACL construction where a GUID must become a Windows SID
Likely causes
- missing administrative GUID prefix mapping
- configuration not replicated to the translating system
- an identity originating outside the local mapping domain
Evidence to collect
- source GUID and resulting SID
- mapping configuration on all participating systems
- effective ACL before and after translation
- access failures involving the substituted principal
How to respond
Define and deploy the intended mapping when consistent identity is required, then regenerate or repair affected ACLs. Verify effective access rather than assuming that successful translation preserved the intended authorization.
Diagnostic interpretation
For this particular status, the decisive evidence is source GUID and resulting SID, mapping configuration on all participating systems. Those details separate the documented condition from unrelated failures that happen to occur nearby.
Record the numeric code together with the symbolic name ERROR_GUID_SUBSTITUTION_MADE, the API or subsystem that produced it, and the first preceding failure. For ERROR_GUID_SUBSTITUTION_MADE, a later cleanup occurrence may describe a consequence instead of the initiating defect.
Example
A diagnostic trace records ERROR_GUID_SUBSTITUTION_MADE after an operation changes subsystem state. The ERROR_GUID_SUBSTITUTION_MADE investigation should follow the first state-changing call, validate its resulting state, and classify later cleanup messages as secondary evidence.
Implementation guidance
Code handling ERROR_GUID_SUBSTITUTION_MADE should distinguish a terminal failure from a warning, progress indication, or request to repeat after a defined state change. When handling ERROR_GUID_SUBSTITUTION_MADE, preserve handles and output fields only where the originating API explicitly keeps them valid. The ERROR_GUID_SUBSTITUTION_MADE path needs bounded retries and cleanup that tolerates partial initialization.
Validation after remediation
Repeat one controlled operation that previously produced ERROR_GUID_SUBSTITUTION_MADE. For ERROR_GUID_SUBSTITUTION_MADE, verify both disappearance of the status and completion of the specific state transition described above. Adjacent messages around ERROR_GUID_SUBSTITUTION_MADE must also be reviewed so a fallback is not mistaken for a complete repair.
References
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