---
title: "IIS 8.5 Detailed Error- 404.13-Not Found exception"
slug: "iis-85-detailed-error-40413-not-found-exception"
updated: 2026-11-05T06:45:38Z
published: 2026-11-05T06:45:38Z
canonical: "docs.biztalk360.com/iis-85-detailed-error-40413-not-found-exception"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.biztalk360.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IIS 8.5 Detailed Error- 404.13-Not Found exception

When you encounter the following error, “IIS 8.5 Detailed Error- 404.13-Not Found exception” on the BizTalk360 web page, follow the suggestion below:

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-1723458814970.png)![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-1723458837610.png)

### Cause of the problem

This error occurs when the value of the “Maximum allowed content length” field differs from the default value of 30000000 in IIS. Variation in the value will lead to an IIS 8.5 Detailed Error: 404.13- Not Found exception.

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-1723458876468.png)

### Solution for the problem

Check in IIS by clicking on the BizTalk 360 application under the default website and redirect to the following path **BizTalk360 → IIS → Request Filtering → Edit feature** settings (in the right panel):

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-1723458914900.png)

In the Edit feature settings, you can find the “**Maximum allowed content length**” property under the section "Request Limits". Change the value of the property to 30000000 if the default value is different.

Save the settings and restart IIS.