Yep, that fixed it for me. Thanks rob.hock!
However our situation was different. We do enforce SSL but the port in the database was set for 6991 for some reason. After running the following query in our database to change the port to 443, all scheduled reports and PDF exports work fine.
Update Websites Set Port=443 where WebsiteID=1
(Special note: My organization only has a single website. If you have multiple Orion sites make sure you choose the correct ID.)