


Working with Active Directory Users: A Beginner's Guide
As a beginner embarking on the realm of Active Directory, understanding the hierarchical structure of objects and the concept of distinguished names (CN) is crucial. Active Directory stores data in a similar manner to file systems, making it a hierarchical system.
Querying Users from Active Directory
To query users in Active Directory, you can employ several methods in .NET. One widely used option is PrincipalSearcher from System.DirectoryServices.AccountManagement. This approach is especially beneficial for searching specifically for user principal objects.
Example: Retrieving User Information
Consider the following code sample that demonstrates how to use PrincipalSearcher to retrieve user information, including username, first name, and last name:
using (var context = new PrincipalContext(ContextType.Domain, "yourdomain.com")) { using (var searcher = new PrincipalSearcher(new UserPrincipal(context))) { foreach (var result in searcher.FindAll()) { DirectoryEntry de = result.GetUnderlyingObject() as DirectoryEntry; Console.WriteLine("First Name: " + de.Properties["givenName"].Value); Console.WriteLine("Last Name : " + de.Properties["sn"].Value); Console.WriteLine("SAM account name : " + de.Properties["samAccountName"].Value); Console.WriteLine("User principal name: " + de.Properties["userPrincipalName"].Value); Console.WriteLine(); } } } Console.ReadLine();
Additional Attributes
On Active Directory user objects, you'll encounter various attributes. Of particular note are:
- givenName: Represents the First Name
- sn: Represents the Last Name
- samAccountName: Traditionally used user logon name
- userPrincipalName: Post-Windows 2000 user logon name (typically)
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