CDOEX/ADO query across administrative groups fails   

Hello,

In my application I'm using the following code to query mailbox
calendar:

    Dim cnxEx As New ADODB.Connection, rsEx As New ADODB.Recordset
    Dim strQuery As String = _
      "SELECT ""DAV:href"" " & _
      "FROM Scope('SHALLOW TRAVERSAL OF """ & CalendarUrl & """')"
    cnxEx.Provider = "MSDAIPP.DSO.1"
    cnxEx.CursorLocation = ADODB.CursorLocationEnum.adUseClient
    cnxEx.Open(MailboxUrl)
    rsEx.Open(strQuery, cnxEx, ADODB.CursorTypeEnum.adOpenStatic,
ADODB.LockTypeEnum.adLockReadOnly)

This works fine for users that have delegate permission on the
calendar being queried if they are in the same administrative group.
If the mailbox is in a different administrative group then an
authentication window pops up when the connection is being opened and
the authentication fails even if the user enters his name & password.
Any ideas?

TIA

date: Mon, 22 Oct 2007 07:55:25 -0000   author:   unknown