JSI Tip 7145. When you try to browse the drives of a domain controller, or map a drive to a domain controller from any client computer, you cannot do so if you try to connect by using the domain controller name?

Microsoft Knowledge Base Article 826902 contains the following Description:

When you try to browse the drives of a domain controller or to map a drive to a domain controller from any client computer, you cannot do so if you try to connect by using the domain controller name. You can browse the drives or map a drive if you...