FMS trigger for Subject in email 'Send Message' window

Question

My goal is to auto-populate certain fields in the 'Send Message' window based on the user creating the email. For example, the sales and purchasing people routinely email their SOs and POs to the Business Partner contact on the document. The vast majority of the time, that is what they use SAP email function for, so it would be great if I could default the Subject appropriately. Here is my query for FMS:
SELECT
CASE (SELECT T0.USER_CODE FROM dbo.OUSR T0 WHERE T0.UserID =$[user])
       when 'Salesperson1' then 'Please see attached confirmation of your sales order'
       when 'Purchaser1' then 'Please see attached PO'
       else ''
end
as message
If I attach this query to a field in another window, e.g. Sales Order Remarks, and trigger Auto Refresh when Field Changes, 'Customer/Vendor' code, the FMS returns the correct message, so  I know the query is good. My problem is that I have so few choices for Auto Refresh field on the Send Message window. Anybody have an idea on how I could get the Subject to populate when the window opens?

Answer 1

The Subject field is the only mandatory field you need to change on that form.  Therefore, FMS may not work unless you click on Priority for every single email.  If you can accept that, refresh based on that field might be viable.
Thanks,
Gordon