Cannot establish NTLM authentication channel with

Question

Hi, 
 
 I recieved this Firewall log, and I don't know what is. Can someone explain for me what is this please? 
 
 Thanks 
 Carlos

LuCar Toni · Answer

Its NTLM/Kerberos. 
 To disable this message, you can disable AD SSO in Device Access under Administration (for all zones). It will disable the module as well and no messages will be generated anymore.

Cannot establish NTLM authentication channel with <domain>

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