Question

I need to get a specific user only knowing the “sAMAAccountName” field.

The thing is, this specific user can be inside of many groups:

OU=ThirdParty
    OU=Company1
        CN=User1   
        CN=User2 
        CN=User3 
    OU=Company2
        CN=User1 
        CN=User2 
        CN=User3 

Is there any way to get an user not knowing their groups, only using one attribute that they have?

My code:

DirectorySearcher search = new DirectorySearcher(_path);
search.Filter = "(&(objectCategory=person)(objectClass=User))";
StringBuilder groupNames = new StringBuilder();
try
{
    SearchResultCollection result = search.FindAll();
    .....
}

Thanks!

EDIT:

Ok, i got it using this code:

DirectorySearcher search = new DirectorySearcher(_entry, "(sAMAccountName=" + userCode + ")");

Answer 1

What information do you need to know about the user? We have used this type of code in the past to retrieve information about a user

using (var identity = new WindowsIdentity(username))
{
    var user = new WindowsPrincipal(identity);

    if (user.IsInRole("Some Role Name"))
        return true;

    return false;
}

EDIT
After your comment, I wonder if this post would provide you any further insite. They so show getting the field you’re requesting, I’m just not sure the code to retrieve the employee will apply to you since this refers to InfoPath: http://msdn.microsoft.com/en-us/library/bb952744(v=office.12).aspx