How Can I Verify Active Directory User Credentials in C#?

Verify Active Directory user credentials in C#

Question:

How to determine the effectiveness of the username and password of Active Directory authentication?

Answer:

For applications deployed on .NET 3.5 and higher versions, System.directoryServices.accountManagement The naming space provides an efficient verification proof mechanism:

This method is simple and reliable, and it is realized in pure C#.

using(PrincipalContext pc = new PrincipalContext(ContextType.Domain, "YOURDOMAIN"))
{
    // 验证凭据
    bool isValid = pc.ValidateCredentials("myuser", "mypassword");
}

Document reference:

.NET Framework 3.5 Directory Security Main Management

System.directoryServices.accoundManagement
Note:
• As mentioned in the related Stack Overflow discussion, this method may sometimes return "True" to the expired user password. When explaining the verification results, please pay attention to this potential behavior.

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