I can't seem to get passthrough authentication to work. My config is as
follows. I have tried to make SMB Signature Manadatory with no luck. Is
there a log somewhere I can look for errors?

Server - "SG-TECH14-W"
Comment - ""
Authentication - "Domain (passthrough)"
Domain - "WCC"
Oplocks - Enabled
DFS - Disabled
Unicode - Enabled
Domain Add-on - Disabled
SMB Signatures - Optional
Share point - "profiles"