Hi,
When Windows Authentication is enabled without Impersonation, IIS accesses resources by using your application's process identity, which
by default is the Network Service account. Do you have further message of the error or anything related to IIS authentication and impersonation. For the second question, as far as I know most web application support getting the authenticated user name, you can use it for folder name.
Zhao Ji Ma
Sincerely,
Microsoft Online Community Support
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