Determine the Exchange role of a server (VBScript)

This code can be found in Chapter 4 of Exchange Server Cookbook

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' This script was originally published in the Exchange Cookbook,
' (http://www.exchangebookcook.com). Written by Paul Robichaux, 
' Missy Koslosky, and Devin Ganger. Redistributed with permission 
' of the publisher, O'Reilly & Associates.

' This code uses ADO to query the MSExchServerRole attribute for all servers
' in the domain. 
' --------------SCRIPT CONFIGURATION------------------
strBase = "<LDAP://cn=administrative groups,cn=<orgName>,cn=microsoft exchange,cn=services,cn=configuration,<domain>"  ' dc=<domain>,dc=<tld>;"
strFilter = "(objectcategory=MSExchExchangeServer);"
strAttrs = "ServerRole,cn;"
strScope = "subtree"
'---------------END CONFIGURATION---------------------
Set objConn = CreateObject("ADODB.Connection")
objConn.Open "Provider=ADsDSOObject;"

Set objRS = objConn.Execute(strBase & strFilter & strAttrs & strScope)
objRS.MoveFirst
While Not objRS.EOF
    strName = objRS.Fields("cn").value

   'Get the value of the MSExchServerRole
    If objRS.Fields("ServerRole").value = 1 Then
          	  strRole = "Front-End Server"
    Elseif IsNull(objRS.Fields("ServerRole").value) Then
	  strRole = "Back-End Server"
    Elseif objRS.Fields("ServerRole").value = 0 Then
	  strRole = "Back-End Server"
    end if
        wscript.echo strName & " is a " & strRole
   objRS.MoveNext
 Wend

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