[Samba] Creating maching trust accounts

[Horace]

Hello,

I have created a machine trust account with the following command 
'pdbedit -a -m -u machinename' and I noticed that after I execute the 
following command 'pdbedit -L -v -u machinename', the Unix username is 
in lowercase letters? Because when I attempt to join a domain with a 
Windows 8.1 machine, it emits a error that it can't find the Machine 
account? Does it matter if the machinename is in capitals or lowercase ?