14:00:51.093 Debug Proxy: Resolving '******'.
14:00:51.093 Debug Proxy: Connecting to none proxy at *******:990.
14:00:51.170 Debug Info: Connection succeeded.
14:00:51.170 Debug Info: Upgrading control connection to TLS/SSL.
14:00:51.170 Info TLS: State StateChange:Negotiating
14:00:51.170 Debug TLS: HandshakeMessage:ClientHello was sent.
14:00:51.229 Debug TLS: HandshakeMessage:ServerHello was received.
14:00:51.245 Info TLS: Using TLS 1.2.
14:00:51.245 Debug TLS: The server supports secure renegotiation.
14:00:51.245 Debug TLS: HandshakeMessage:Certificate was received.
14:00:51.245 Debug TLS: HandshakeMessage:ServerKeyExchange was received.
14:00:51.245 Debug TLS: HandshakeMessage:ServerHelloDone was received.
14:00:51.245 Debug TLS: Verifying server certificate (**********************).
14:00:51.276 Debug TLS: Certificate verification result: Accept
14:00:51.276 Debug TLS: Using ephemeral ECDH public key exchange with NIST P-256 curve.
14:00:51.276 Debug TLS: HandshakeMessage:ClientKeyExchange was sent.
14:00:51.276 Debug TLS: CipherSpec:ChangeCipherSpec was sent.
14:00:51.276 Debug TLS: HandshakeMessage:Finished was sent.
14:00:51.341 Debug TLS: CipherSpec:ChangeCipherSpec was received.
14:00:51.341 Debug TLS: HandshakeMessage:Finished was received.
14:00:51.341 Info TLS: State StateChange:Secured
14:00:51.341 Info TLS: Connection secured using cipher: TLS 1.2, RSA with ephemeral Elliptic Curve Diffie-Hellman, AES with 256-bit key in CBC mode, SHA384
14:00:51.341 Debug TLS: Session ID:
0000 |B9-33-00-00-D9-86-72-CD 35-EA-A9-61-8B-F4-CD-D9| .3....r.5..a....
0010 |13-4C-5F-C8-94-7F-A7-7F D6-3C-27-85-DD-2D-48-6E| .L_......<'..-Hn
14:00:51.341 Debug Info: Control connection upgraded to TLS/SSL.
14:00:51.341 Info Response: 220 Microsoft FTP Service
14:00:51.387 Info Command: USER **********
14:00:51.460 Info Response: 331 Password required
14:00:51.460 Info Command: PASS **********
14:00:54.028 Info Response: 530 User cannot log in.
14:00:54.029 Error Info: Rebex.Net.FtpException: User cannot log in (530).
at Rebex.Net.Ftp.IH(String D, String J, String L)
14:00:54.030 Debug TLS: Closing TLS socket.
14:00:54.030 Info TLS: Alert Alert:Alert was sent.
14:00:54.030 Info TLS: State StateChange:Closed
I have used verbose logging and found the password is the correct one.