Hello,

I am attempting to implement email-to-case for one of our teams that is already using SF and has some complex business processes.  The issue is that they work from a custom "Work Orders" object, that is related to cases and about half the time they send emails to customer from THERE, not from cases.

This means that the 'thread ID' for the case will NOT be inserted into the email when it is sent, so a response will NOT automatically be attached to the case.  I am looking for a way to add this, but it looks like there is not way in apex to add the thread id to the email before it is sent.

Is my only option then a custom button?  I guess I would set up a 'dummy' email template that I could reference with a URL hack that just pulls in the thread ID automatically?  This also means that the hundred of email templates (as well as those included in WF) would have to be updated as well to include a merge field for the case's thread ID.

Is there an easier and more sure-fire way of doing this?

Thanks,
Jeremy Stender