NTSTATUS 0xC0000445 (STATUS_CS_ENCRYPTION_FILE_NOT

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: An SMB Client-Side Encryption FSCTL was sent on a handle that represents an ordinary non-CSE file.

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STATUS_CS_ENCRYPTION_NEW_ENCRYPTED_FILE	STATUS_INVALID_LABEL

STATUS_CS_ENCRYPTION_FILE_NOT_CSE

A Client-Side Encryption control request targeted a normal file

The SMB client issued a CSE-specific file-system control operation, but the open file was not established as a Client-Side Encryption file. This usually means the client state machine, handle selection, or earlier create response does not match the FSCTL being sent.

Do not add encryption metadata blindly to make the control code succeed. Confirm that the handle belongs to the intended file and that the previous status actually required CSE mode. Reused handles and retry paths can accidentally send an encrypted-file control request to a different ordinary open.

What to inspect

Match the FSCTL to the exact SMB file identifier and create response.
Trace mode transitions after reconnect, retry, and handle reuse.
Use ordinary SMB I/O for a non-CSE file or reopen the correct encrypted object.

References

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