Article ID: 112575, created on Oct 20, 2011, last review on May 7, 2014

  • Applies to:
  • Plesk 10.x for Windows


Sometimes browser displays the following error if you browse the domain with IDN name.

401 - Unauthorized: Access is denied due to invalid credentials.
You do not have permission to view this directory or page using the credentials that you supplied.

It can appear if more than 300 domains uses single application pool.


Issue is caused by IIS 7.5. Sometimes it uses invalid credentials for anonymous authorization.


This issue is under investigation. It can be fixed by restarting application pool that is used by this website.

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