Finally I can show you my script to enumerate the message restrictions (send to rights as I tend to call then) on a distributionlist. The send to rights consists of 2 pieces, the users and the groups rights.
The users with send to rights are enumerated in the authOrig attribute of the distribution list AD object, the groups are allocated in the dLMemSubmitPerms attribute. Both attributes are arrays.
I also found out that when a listed user or resource mailbox had send as rights on it’s Active Directory object the users listed in the send as also have send to rights on the distribution list.

Follow the next steps to run the script (no admin rights needed):

* find the distinguished name of the nested group (adsiedit.msc)
* open your favorite text editor
* copy and paste the script into the editor
* change the distinguished name
* save the script (for example c:tempenumeratesendtorights.vbs)
* open a command prompt
* go to “c:temp”
* give “cscript enumeratesendtorights.vbs” (without quotes) and enter

The script:

' Name : enumeratesendtorights.vbs
' Description : script to enumerate the message restrictions (send to rights) of a distributionlist
' Author : dirk adamsky - deludi bv
' Version : 1.10 added check on attribute type based on input from Pedro (see comments)
' Date : 11-03-2010 (v.1.00 date 08-02-2010)
' Level: advanced

Set objSourceGroup = GetObject("LDAP://CN=distribution list (all members),OU=groups,DC=test,DC=org")
If objSourceGroup.authOrig <> "" Then
	If TypeName(objSourceGroup.authOrig) = "String" Then
		GetSendToRights ("LDAP://" & objSourceGroup.authOrig)
	Else
		For Each User In objSourceGroup.authOrig
			GetSendToRights ("LDAP://" & User)
		Next
	End If
End If
If objSourceGroup.dLMemSubmitPerms <> "" Then
	If TypeName(objSourceGroup.dLMemSubmitPerms) = "String" Then
		EnumNestedgroup objSourceGroup.dLMemSubmitPerms
	Else
		For Each Group in objSourceGroup.dLMemSubmitPerms
			EnumNestedgroup Group
		Next
	End If
End If
Set objSourceGroup = Nothing

Function GetSendToRights(strUserDN)
	On Error Resume Next
	Set objAccount = GetObject(strUserDN)
	Wscript.Echo objAccount.Mail & " ; " & objAccount.DisplayName & " ; direct send to rights"
	Set objSecurityDescriptor = objAccount.Get("ntSecurityDescriptor")
	Set objDacl = objSecurityDescriptor.DiscretionaryAcl
	Set objAce = CreateObject("AccessControlEntry")
	For Each objAce In objDacl
		If objAce.ObjectType = "{AB721A54-1E2F-11D0-9819-00AA0040529B}" Then
			If (Left(objAce.Trustee,3) <> "S-1" And objAce.Trustee <> "NT AUTHORITYSELF") Then
				GetUserDetails Mid(objAce.Trustee,9)
			End If
		End If
	Next
End Function

Function GetUserDetails(strPreW2K)
	Set adoCommand = CreateObject("ADODB.Command")
	Set adoConnection = CreateObject("ADODB.Connection")
	adoConnection.Provider = "ADsDSOObject"
	adoConnection.Open "Active Directory Provider"
	adoCommand.ActiveConnection = adoConnection

	' Search entire Active Directory domain.
	Set objRootDSE = GetObject("LDAP://RootDSE")
	strDNSDomain = objRootDSE.Get("defaultNamingContext")
	strBase = "<LDAP://" & strDNSDomain & ">"

	' Filter on user objects.
	strFilter = "(&(objectCategory=person)(objectClass=user)(sAMAccountName=" &  strPreW2K & "))"

	' Comma delimited list of attribute values to retrieve.
	strAttributes = "mail, displayname"

	' 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
	Wscript.Echo adoRecordset.Fields("mail").Value & " ; " & adoRecordset.Fields("displayname").Value & " ; indirect send to rights"
	' Clean up.
	adoRecordset.Close
	adoConnection.Close

	Set adoRecordset = Nothing
	Set objRootDSE = Nothing
	Set adoConnection = Nothing
	Set adoCommand = Nothing
End Function	

Sub EnumNestedgroup(strGroupDN)
	Set objGroup = GetObject("LDAP://" & strGroupDN)
	For Each objMember in objGroup.Members
		If (LCase(objMember.Class) = "group") Then
			Call EnumNestedgroup(objMember.AdsPath)
		Else
			GetSendToRights objMember.AdsPath
		End If
	Next
	Set objGroup = Nothing
End Sub

When you have problems/questions with the script please post a reply.

Happy scripting.

Best regards,

Dirk Adamsky