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Group policy
computer configuration \ windows settings \security settings\local policies \security option


Microsoft network client: Digitally sign communication ( if server agreed)   Disable
Microsoft network server : Digitally sign communication ( if client agreed)   Disable
Network security : Lan Manager authentication level Send LM and NTLM - use NTLMv2 session security if negotiated - (default) send LM & NTLM responses
Domain member : Digitally encrypt or sign secure channel data (always) - disabled
Domain member :Require strong (Windows 2000 or later) session key - disabled