Active Directory Installation Wizard Single-Label Domain Names

Applies To: Windows 7

The Active Directory Installation Wizard (Dcpromo.exe) in Windows Server® 2008 R2 now prevents the creation of new Active Directory domains using single-label names, however existing single-label domains can still be upgraded to Windows Server 2008 R2.

Additional references

For more information, see Information about configuring Windows for domains with single-label DNS names in the Microsoft Knowledge Base (