If this security setting is enabled, the Server Message Block (SMB) redirector is allowed to send plaintext passwords to non-Microsoft SMB servers that do not support password encryption during authentication. Sending unencrypted passwords is a security risk. Default: Disabled Counter Measure: Configure the Microsoft network client: Send unencrypted password to connect to third-party SMB servers setting to Disabled. Potential Impact: Some very old applications and operating systems such as MS-DOS, Windows for Workgroups 3.11, and Windows 95a may not be able to communicate with the servers in your organization by means of the SMB protocol. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Microsoft network client: Send unencrypted password to third-party SMB servers (2) REG: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanWorkstation\Parameters!EnablePlainTextPassword