Diagnostic: impstd - e.net UserId
This diagnostic will trace each e.net UserId. 
This is a GUID that uniquely identifies the instance of e.net and forms part of the state information.
The e.net system will automatically output the UserId - you do not have to tell the system to output this trace.
Viewer Information
The information shown in the viewer is:
'Guid : d29c7d7b-49e5-49db....' means that the specified guid was used by this instance of e.net solutions.