Is it possible, for all users, to turn off all the automatic messages that are send by Workflow accelerator?
It is possible to restrict which types of e-mails are automatically sent by the Workflow Accelerator. Please notice that it isn't possible for all notification types.
The following two links describe for which types of messages it is possible and how to set it up in the options.
KBA , BPI-SIG-PG-EDT , Process Governance Editor , How To