AppFabric workflows, hosted in IIS, expose no different an endpoint than a WCF service. If you are familiar with WCF diagnostics, there’s nothing new to learn here. If you aren’t, here are the details that I have received through a support ticket with Microsoft:
- How to enable logging information for several Windows Workflow Foundation namespaces.
- Configuring WCF Tracing
- Service Trace Viewer Tool
- Download SvcTraceViewer.exe from Windows SDK