Non-domain joined server 2008 R2 machine can access c$ of a Server 2008 R2 domain joined server

i have installed server 2008 r2 machine , didn't join domain yet.  if \\fqdn\c$ of domain joined server 2008 r2 machine, can connect c$ , have full permissions it.  uac enabled on domain joined server , under c:\ permissions, isn't listed there.  have attached jpg image of security under ld c:.  sharing not enabled. 

did use same password administrator account used domain's administrator account or domain joined server's local administrator account?

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brandon wilson - premier field engineer (platforms)

Windows Server  >  File Services and Storage