So, we had 12.1.1 and we have some existing XML Publisher reports.
Now we've upgraded to 12.1.3, and there is a new option when running a concurrent request called "Delivery Options".
This allows, among other things, to deliver the output to an email address.
In testing this, I tried running a report that typically outputs to Excel....however when it sends the email (again, not using a bursting control file, but the delivery options in the concurrent request), the attachment comes over with an extension of .EXCEL instead of .XLS
Does anyone know where I can change that extension?