IIS Error 500.19 while accessing pages under the altiris site

Products

• Management Platform (Formerly known as Notification Server)
• Task Server

Issue/Introduction

Many clients were getting the following error when trying to connect to the SMP or Task server

 Invalid data received in HTTP response.

The IIS logs on the SMP or Site server show error 500.19

Cause

The IIS User was not allowed access to the files

Resolution

Add read rights to the IIS user to the Altiris folder

If that doesn't work give Everyone read rights to the Altiris folder.