JSI Tip 7176. How can I test if a computer is a logged on to a domain?

Starting with Windows NT 5.0 (Windows 2000), the UserDNSDomain environment variable is populated with the DNS domain name when the user is logged on to a domain.

To test for the %UserDNSDomain% environment variable:

set dom=N
if defined UserDNSDomain set dom=Y

To define an environment variable that contains the domain or workgroup name:

set dom=N
if defined UserDNSDomain set dom=Y&set WORKGROUP=%UserDNSDomain%
if "%dom%" EQU "N" For /F "tokens=3" %%i in ('Net Config Workstation^|Find /i "Workstation Domain  "') Do @Set WORKGROUP=%%i

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