Symptoms
 

Receiving this error when using and IPC Event to create a synchronous subprocess instance:

SourceCode.Workflow.Common.EWS: The e-mail address Administrator@denallix.com does not have 'send on behalf of' permissions on Exchange.

Diagnoses

In order to send an email on behalf of another account, either the originator account must delegate to the sending account, or the sending account must have "Send As" permission on the Exchange Server. Otherwise you will get the described error.

Resolution

The following document has information on configuring “Send As” permissions on an Exchange Server:

http://www.slipstick.com/exchange/configuring-send-as-permissions-on-exchange-server/