HR ESS

[John A Haworth]

Hi all
 
Could someone please help with the following questions. Soon to be
implementing the ESS system, with workflow for Travel Expenses,
 
I believe that the ESS user name is maintained in the comms info type of
the HR master record, does the workflow send WI's to the ESS user inbox? or
has there to be a SAP user ID also defined?
Has the ESS user to be a registered SAP user, how is the SAP license
calculated?
 
Many thanks John