Article ID: 126199, created on Jul 15, 2015, last review on Sep 18, 2015

  • Applies to:
  • Plesk 12.0 for Windows


When a website is opened, it asks for authentication or redirected to IIS error message:

HTTP Error 401.3 - Unauthorized
You are not authorized to view this page due to invalid authentication headers.

IIS > Sites > > Authentication > Anonymous Authentication > Specific user is selected.


IWPG_ users does not have permissions to access vhost directory files.


  1. Find proper system username for affected domain:

    "%plesk_bin%"\dbclient.exe --direct-sql --sql="select login from sys_users where home like '';"
  2. Grant read permissions for user 'exampleuser':

    icacls "%plesk_vhosts%"\\httpdocs /grant IWPG_exampleuser:r /T

Search Words

HTTP Error 401.3 - Unauthorized

authentication or redirected to IIS error message

ed7be2b984f9c27de1d2dc349dc19c6d 56797cefb1efc9130f7c48a7d1db0f0c a914db3fdc7a53ddcfd1b2db8f5a1b9c 85a92ca67f2200d36506862eaa6ed6b8 a766cea0c28e23e978fa78ef81918ab8

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