Internet Information Services 7.5

Error Summary

HTTP Error 401.3 - Unauthorized

You do not have permission to view this directory or page because of the access control list (ACL) configuration or encryption settings for this resource on the Web server.

Detailed Error Information
IIS Web Core
Error Code
Requested URL
Physical Path
Logon Method
Logon User
Most likely causes:
  • The user authenticated by the Web server does not have permission to open the file on the file system.
  • If the resource is located on a Universal Naming Convention (UNC) share, the authenticated user may not have sufficient share and NTFS permissions, or the permissions on the share may not match the permissions on the physical path.
  • The file is encrypted.
  • Things you can try:
  • Open Windows Explorer and check the ACLs for the file that is being requested. Make sure that the user accessing the Web site is not being explicitly denied access, and that they do have permission to open the file.
  • Open Windows Explorer and check the ACLs for the share and the physical path. Ensure that both ACLs allow the user to access the resource.
  • Open Windows Explorer and check the encryption properties for the file that is being requested. (This setting is located in the Advanced attribute properties dialog.)
  • Create a tracing rule to track failed requests for this HTTP status code. For more information about creating a tracing rule for failed requests, click here.
  • Links and More Information The user trying to access the page was successfully logged on, but the user does not have permission to access the resource. This means the access control list (ACL) for the resource either does not include the user or explicitly denies the user. Check the ACL for the resource and add the user to the ACL. If the content is located on a share, ensure both NTFS and share permissions allow the user access. It is also possible that the user is part of a group that is denied access.

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    Microsoft Knowledge Base Articles:

  • 907273
  • 332142