Excel XML - force sort when XML spreadsheet file is opened

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Hi, I'm not sure if this is the correct forum, but it IS related to MS Excel...

I have an XML Spreadsheet that I'm creating on the mainframe and sending to my users. I would like for the data in the rows (which I'm creating on the fly with a COBOL program on the MF) to be sorted when the user opens the XML attachment (which opens in Excel). I have the following tags in the XML:

  <Sorting xmlns="urn:schemas-microsoft-com:office:excel">
   <Sort>Delivery Method</Sort>
   <Sort>Customer Name</Sort>
  </Sorting>

Delivery Method is column 2, Customer Name is column 1.

So when I select the data range and click 'Data', 'Sort...', it defaults to this sort sequence, but I would like for it to sort the data when the spreadsheet is opened instead of the user having to do this. Is there a way to "force" this sort operation to happen when the attachment is opened?

Thanks!
Scott