FIX: LmCompatibilityLevel value changes back to "2" on Domain Controller.
If, after changing the 'LmCompatibilityLevel' value to "3", "4" or "5", it automatically reverts to "2", then read the instructions in this tutorial to fix the problem. I recently changed the default domain policy "Network security: LAN Manager authentication level"* (aka: "LmCompatibilityLevel") from "Send LM & NTLM responses" to "Send NTLMv2 response only. Refuse LM […]
