Másképpen „LAN Manager authentication level”, vagy „LMCompatibilityLevel”.
gpedit.msc
-t!Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa] "LmCompatibilityLevel"=dword:00000005 "LmCompatibility"=dword:00000003 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0] "AllowLegacySrvCall"=dword:00000001
gpedit.msc
-t!Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters] "enablesecuritysignature"=dword:00000001 "requiresecuritysignature"=dword:00000000
sudo mount.cifs --verbose '//11.22.33.44/foo' /tmp/bar -o 'domain=XXX,user=administrator,password=yyy,sec=ntlmv2i'
dmesg | tail
man 8 mount.cifs