VERIFIED SOLUTION i
Product Feature: Customer Services
It is not possible to delete Enquiries in Confirm and no level/combination of permissions will allow you to.
The alternative route to pursue would be to assign the Enquiry an appropriate Enquiry Status (Super Users will have the ability to create Status Types within the system).
If, for example, you have raised a number of 'Test' jobs and scenarios you cannot subseqently delete them. Instead you must assign them the most appropriate Status.
UPDATED: May 9, 2017