Emails marked as private are stored in the CRM. The standard access concept ensures that these emails are protected against unauthorized access. Only selected administrators with the admin flag set (cubes administrators) are given full access to emails. Project engineers are advised during the upgrade to assign this flag only to administrators who are equivalent to Exchange administrators. It is not intended to delete private emails from the CRM after they have been sent. As part of the further development of an email security package, at least the body of private emails (and private appointments) should be encrypted.