| Previous | Next |
| STATUS_CRED_REQUIRES_CONFIRMATION | STATUS_CS_ENCRYPTION_UNSUPPORTED_SERVER |
STATUS_CS_ENCRYPTION_INVALID_SERVER_RESPONSE
The SMB server returned an invalid Client-Side Encryption response
Client-Side Encryption in this status family refers to the SMB client workflow that carries EFS-related information for remote files. The server claimed or entered that workflow but returned data the client could not validate or interpret for the encrypted open.
Capture the SMB dialect, the create and FSCTL sequence, and the exact response payload before retrying. The failure can indicate an incompatible server implementation, corrupted EFS metadata, or a protocol-state mismatch. It is not corrected by disabling transport encryption, because SMB transport encryption and EFS file encryption protect different layers.
What to inspect
- Record the server implementation, SMB dialect, and failing CSE request.
- Inspect the response length, structure fields, and preceding create result.
- Compare behavior with a supported Windows server before changing file encryption metadata.
References
- Microsoft: System error codes 6000 through 8199
- Microsoft Open Specifications: NTSTATUS values
- Microsoft Open Specifications: SMB error classes and codes
Looking for a different code? Search another status or error code.