Symptoms
Would like to change the "From Address" to someAddress@domain.com.
Diagnoses
Trying to change the workflow "From Address".
Resolution
Change the "From Address" in the SourceCode.EventBus.Server.config file (this is located in [INSTALLDIR]K2 blackpearlHost serverin, in the Sendmailfrom node). After making the change, you will need to restart the K2 service.