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How to check if a user already exists in the Active Directory

Posted on 2014-01-30
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Last Modified: 2014-02-02
Hello,

I'm looking for a script embedded in a HTML side or similar, which asks for the userPrincipalName.

After entering this information, it should return with a message if user with this name already exists in the domain or not.

If anybody with same userPrinicalName exists somewhere in the domain it should
also tell the admin which OU does contain this user

Does anyone know where to get this script?

insi01
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Question by:insi01
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2 Comments
 
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Assisted Solution

by:Big Monty
Big Monty earned 250 total points
ID: 39824349
you would need some kind of server side technology to do this, you won't find anything that does it client side, as that is a breach of security.

Here's a vbscript that checks for a user in AD
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LVL 65

Accepted Solution

by:
RobSampson earned 250 total points
ID: 39827409
Hi, here is a VBScript I use to check if a username already exists.

Rob.

strUsername = InputBox("Enter username:", "Username")
strLoginCheck = Get_LDAP_User_Properties("user", "samAccountName", strUsername, "adsPath")
If InStr(strLoginCheck, "LDAP://") > 0 Then
	WScript.Echo "Login name already exists: " & strUsername & vbCrLf & "for " & strLoginCheck
End If


Function Get_LDAP_User_Properties(strObjectType, strSearchField, strObjectToGet, strCommaDelimProps)
      
      If InStr(strObjectToGet, "\") > 0 Then
            arrGroupBits = Split(strObjectToGet, "\")
            strDC = arrGroupBits(0)
            strDNSDomain = strDC & "/" & "DC=" & Replace(Mid(strDC, InStr(strDC, ".") + 1), ".", ",DC=")
            strObjectToGet = arrGroupBits(1)
      Else
            Set objRootDSE = GetObject("LDAP://RootDSE")
            strDNSDomain = objRootDSE.Get("defaultNamingContext")
      End If
 
      strDetails = ""
      strBase = "<LDAP://" & strDNSDomain & ">"
      ' Setup ADO objects.
      Set adoCommand = CreateObject("ADODB.Command")
      Set ADOConnection = CreateObject("ADODB.Connection")
      ADOConnection.Provider = "ADsDSOObject"
      ADOConnection.Open "Active Directory Provider"
      adoCommand.ActiveConnection = ADOConnection
 
 
      ' Filter on user objects.
      'strFilter = "(&(objectCategory=person)(objectClass=user))"
      strFilter = "(&(objectClass=" & strObjectType & ")(" & strSearchField & "=" & strObjectToGet & "))"
 
      ' Comma delimited list of attribute values to retrieve.
      strAttributes = strCommaDelimProps
      arrProperties = Split(strCommaDelimProps, ",")
 
      ' Construct the LDAP syntax query.
      strQuery = strBase & ";" & strFilter & ";" & strAttributes & ";subtree"
      adoCommand.CommandText = strQuery
      adoCommand.Properties("Page Size") = 100
      adoCommand.Properties("Timeout") = 30
      adoCommand.Properties("Cache Results") = False
 
      ' Run the query.
      Set adoRecordset = adoCommand.Execute
      ' Enumerate the resulting recordset.
      Do Until adoRecordset.EOF
          ' Retrieve values and display.
          For intCount = LBound(arrProperties) To UBound(arrProperties)
                If strDetails = "" Then
                      strDetails = adoRecordset.Fields(intCount).Value
                Else
                      strDetails = strDetails & vbCrLf & adoRecordset.Fields(intCount).Value
                End If
          Next
          ' Move to the next record in the recordset.
          adoRecordset.MoveNext
      Loop
 
      ' Clean up.
      adoRecordset.Close
      ADOConnection.Close
      Get_LDAP_User_Properties = strDetails
 
End Function

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