During a ZTI based deployment we received intermittent reports of computers with the default domain name being set to the workstation instead of the domain it had joined.
Steps to reproduce the problem.
Set DefaultDomainName to the same name as the domain the computer is joined with mis-matching case.
Click the Drop-down box on the CTL+ALT+DEL screen, the logon box will change the Default Domain to be the workstation.
Cause:
When the DefaultDomainName is set to a name not matching the NetBIOS domain name, the workstation sets the Default domain name to the workstation.
This includes names that do not match case.
A custom script set the
"HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\DefaultDomainName" registry field but stored the domain name in lower case.
Resolution:
Modify the custom script to extract the domain from WMI.
"Select DomainName from Win32_NTDomain Where NOT DnsForestName IS NULL"
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