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ERROR_DS_DUP_MSDS_INTID
An internal schema identifier is duplicated
Microsoft documents msDS-IntId as an internal-use attribute on schema objects. This error means the value associated with the proposed update is not unique in the directory schema state. It is distinct from duplicate OID, schemaIDGUID, or lDAPDisplayName errors because the collision is in an identifier managed for internal schema processing.
Search the schema NC for the duplicated value only as a diagnostic step and compare the two schema objects involved. Do not renumber the field by hand in production. If a vendor or migration script explicitly wrote the value, validate that behavior against the supported schema package. If the conflict follows replication or partial import, preserve schema-master and replication evidence before another retry.
What to inspect
- Identify every schema object carrying the conflicting
msDS-IntId. - Determine whether one object came from a partial or repeated extension import.
- Leave internal identifier assignment to supported directory and schema tooling.
References
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