---
title: "The authentication schemes error"
slug: "the-authentication-schemes-error"
updated: 2024-12-19T12:42:16Z
published: 2024-12-19T12:42:16Z
canonical: "docs.biztalk360.com/the-authentication-schemes-error"
---

> ## 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.

# The authentication schemes error

If you get such an error:

The authentication schemes configured on the host ('Ntlm') do not allow those configured on the binding 'WebHttpBinding' (Negotiate)

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-1701427893281.png)

![](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image-1701427920979.png)

If the Provider "Negotiate" is removed from the Default Website>Authentication>Windows Authentication>Providers, then the above issue occurs.

In order to overcome this issue, you need to add “Negotiate” provider for the Default website under IIS as shown below:

![image.png](https://cdn.document360.io/253f6006-3994-42d0-98cd-fdc637f51791/Images/Documentation/image%28172%29.png)

Once it is done, it is required to reset IIS from the command prompt for the changes to get reflected.