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ERROR_DS_SRC_AND_DST_OBJECT_CLASS_MISMATCH
The target object is not the same kind of security principal
Migration operations that merge identity state into an existing destination object require compatible source and destination classes. A source user cannot safely be matched to an unrelated group, and a group cannot inherit the account-specific attributes of a user. Similar names or matching account strings do not override the structural-class requirement.
Resolve both objects by GUID and inspect their most-specific structural classes, SID state, and account attributes. Determine whether the destination was pre-created with the wrong class or whether the migration mapping selected the wrong object. Correct the mapping or recreate the target using the supported class; do not attempt to change an object’s structural class by editing objectClass, because Active Directory schema rules do not permit arbitrary class conversion.
What to inspect
- Compare structural objectClass values on source and destination.
- Review migration matching rules for same-name objects.
- Recreate an incorrectly pre-staged target with the proper class.
References
- Microsoft: source and destination principal migration
- MS-ADTS: structural-class constraints
- MS-ADTS: user and group object definitions
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