Hi.
So we think we fixed the bug.
Can you please check your customers backup import into 8.4 2017.10.03 version latest build and let us know. It is available on standardinstall.com after you log in as test version.
The register for Order Classes is common for Sales orders and Service orders. When I set an Order Class to create an Activity - it works for Sales Order, while for Service Orders - not. Is any setting...
