|No confusion at this end.|
It would appear to me that you are unclear as to the difference between joining a workgroup and joining a domain.
It would further appear you are trying to get a workstation in a workgroup to access resources on a domain server.
I told you above how to do that.
So what do you think these messages mean?
"\\SERVERNAME is not accessible. You might not have permission to use this network resource."
"Logon failure: user account restriction"
You are focusing on the workstation not the server. If you want access to the server you need an account and password ON THAT SERVER. It appears from the above messages you have neither.
Without an account on the server [and its associated rights and share access assignments] you are denied access to the servers resources which is why you can't connect.
Example of Oxymoron:
Person who is pro life and anti sex education.
Education is key to prevention. Prevent conception you prevent abortion.
Abstinence training clearly isn't working.