401 - Unauthorized: Access is denied due to invalid

使用Windows集成验证，不管使用IIS还是IIS express，当同一个域进行访问时，可能出现401错误，错误的处理办法：

1. IIS（摘自MSDN的）

IIS 7 was difficult for figuring
out why i was getting the 401 - Unauthorized: Access is denied due to invalid
credentials... until i did this...

1.) Open IIS and select the website
that is causing the 401

2.) Open the "Authentication"
property under the "IIS" header

3.) Click the "Windows
Authentication" item and click "Providers"

4.) For me the issue was that
Negotiate was above NTLM. I assume that there was some kind of handshake going
on behind the scenes, but i was never really authenticated. I moved the NTLM
to the top most spot, and BAM that fixed it.

2.IIS express

相应的IIS express你必须找到其配置文件:C:\Users\v-xiaofz\Documents\IISExpress\config\applicationhost.config

然后设置如下：

<authentication>

<anonymousAuthentication
enabled="false" userName="" />

<basicAuthentication
enabled="false" />

<clientCertificateMappingAuthentication enabled="false" />

<digestAuthentication
enabled="false" />

<iisClientCertificateMappingAuthentication enabled="false">

< /iisClientCertificateMappingAuthentication>

< windowsAuthentication enabled="true">

< providers>
<add
value="NTLM" />
< add value="Negotiate"
/>
< /providers>

< /windowsAuthentication>

< /authentication>

上面红色部分非常关键，出现401错误就是因为两个交换位置了