Recently I was searching for knowledge base regarding impersonation in Plugins and here were some of my findings.
Impersonation in Plugins
The following grid shows the various user identities present for Plugins. ‘Triggering User’ refers to the logged in user who saves the record in Dynamics CRM and triggers a Plugin to fire. It’s also worth noting that offline plugins will fire once offline as shown and then *again* on the server.
Impersonation in Dialogs and Workflows
The following grid shows the various user identities present for Workflows and Dialogs. The interesting thing here is the difference between Parent and Child Automatic Workflows.
Hope it helps someone!!!