SMB issue - account mapped as "" / nobody

[sfanla]

Hello, I'm running my new TrueNAS CORE V13.0 and Windows 11.
I have setup a child dataset as SMB type
I have set up an SMB share and am trying to log in using my user "truenas" that I created in accounts by selecting alternative credentials in Windows.

When I try to connect, when looking in my log

midclt call smb.status AUTH_LOG | jq

I get the following lines which I think point to my issue

"clientDomain": "",
"clientAccount": "",
"workstation": "LAPTOP-MSN1DS",
"becameAccount": "nobody",
"becameDomain": "TRUENAS",
"becameSid": "S-1.... ",
"mappedAccount": "",
"mappedDomain": "",

So why would the user I enter become the domain and the account remain blank?