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E_ADS_INVALID_USER_OBJECT
E_ADS_INVALID_USER_OBJECT should be diagnosed at the object-identity and class layer. A DN can be well formed yet refer to a contact, computer, group, deleted object, or simply a nonexistent entry; a user-specific ADSI operation still cannot proceed in those cases.
Verify identity, class, and access separately
- Log the target ADsPath exactly as bound, including the server name when one is explicitly selected.
- Search the parent container for the DN or stable object identifier and verify the returned schema class before invoking user-specific interfaces.
- Keep access-denied evidence separate from object-not-found evidence; Microsoft lists existence, path spelling, and access rights as distinct checks for this code.
For movable Active Directory objects, a cached distinguished name can become stale. IADs also exposes a GUID form that can be used to bind directly to an object in Active Directory. If a user lookup intermittently fails after rename or move operations, compare the stored DN with the current ADsPath or object GUID. Do not try to fix the failure by writing user attributes—the problem is establishing the correct object first.
Generic ADSI errors · Binding Active Directory objects · IADs object properties
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