IIS, CGI environment, Mirroing local administrator to domain Administrator on Domain Controller

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Problem description

Environment:

Machine A as a domain controller of MyDomain(Win2003+IIS 6.0)

Machine B as a standalone machine (Win2003)

Machine A and B have the same account name, "Administrator" and their =
passwords are the same.

Scenario:

1. Log on machine B as Local Administrator

2. Use IE in machine B to connect CGI in machine A (CGI enables only =
Integrated Window Authentication)

3. Authentication passed and get user ID as "MyDomain\Administrator" =
from CGI environment variable, "REMOTE_USER", in machine A

Our question is why authentication passed. Will Windows mirror Local =
Administrator to Domain Administrator automatically?

We found that this behavior only happens for native Administrator =
account, not for other new created account.

is this by design?, kind of unexpected to us.=20



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