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STATUS_WRONG_PASSWORD_CORE
The legacy server did not accept the presented password
This status belongs to older LAN Manager and MS-NET compatibility paths. It identifies credential rejection by that remote account authority, not a general failure of current Windows interactive logon. Password conversion and legacy hash availability may also affect these protocols.
Do not enable obsolete authentication globally merely to clear the error. Confirm whether the destination is genuinely a legacy server, an embedded SMB implementation, or a modern service using an incorrect compatibility mode.
What to inspect
- Identify the remote protocol dialect and authentication package actually negotiated.
- Test the account directly against the authoritative legacy server without exposing the password in logs.
- Upgrade the server or isolate a narrowly scoped compatibility path rather than weakening domain-wide policy.
References
- Microsoft Open Specifications: Netlogon Remote Protocol
- Microsoft Open Specifications: SAM Remote Protocol
- Microsoft Open Specifications: SAM password policy
- Microsoft Open Specifications: NTSTATUS values
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