Has anyone successfully customized the standard Open Sales Orders report? I'd like to remove the SOs with Closed status but I had no luck in using Status and Order Status. We'd like to use it since it can show a snapshot of open SOs as of a specific time. Thank you.

If you click customize and edit the filter for "order status" that should work. It will save as a "new" report as you can't save over the standard open sales order page.

I can't edit the Order Status filter. Weird.