Going Back to IPS
At the beginning of the chapter, we discussed a fictitious distributed application called IPS that uses Exchange Web Services at two points during the work process. You should now be able to see that Exchange Web Services can send out e-mails on behalf of the procurement specialist as well as schedule meetings. First, the IPS service account that makes requests to Exchange Web Services must be given the ms-Exch-EPI-Impersonation right against the Exchange CAS and the ms-Exch-EPI-May-Impersonate right against all Mailbox databases that contain users to be impersonated. Second, to fill in the ExchangeImpersonation header, the IPS service account must know the user principle name, the SID, or the primary SMTP address of the procurement ...
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