hello :
  i want to do the backup for exchangeserver with the CdoExm ,but when i 
get the inforabout the server 
like this:
   ==============================================
   Dim ds2                     As IDataSource2
   Dim iExs                    As New CDOEXM.ExchangeServer
   Dim sServerName             As String
   Set ds2 = iExs
   ds2.Open sServerName
   ======================
   always the " iExs.StorageGroups " is null(No Variables) , i don't why ? 
   also  i don't know how to backup the publicstoreDB and Mailboxdb with 
CdoExm.

   Please Help me ,thanks!