Hey all. I’m trying to build a saved search that pulls billed invoices from before today, and sales orders delivered today or in the future. I know it is a Case When function though I don’t know the exact syntax. Does anyone know any resources where I could learn this?

You could use a formula criteria with a CASE statement, but it sounds like you should just be able to use regular saved search criteria with the "Use Expressions" option (and/or). Read: NS Help: Using And/Or Expressions in Search Criteria