Click search enquiries (from the grey left hand menu).
Expand the Search Options, then click Show Advanced Options Alter your search criteria using the drop-down menus. Typically, Select Category and Select Team in the Enquiry Criteria and Staff Criteria will be used. You might also want to filter the All Enquiries drop-down if you’re only searching for the open enquiries. The relevant enquiries will then be listed below the boxes when you scroll down the page. 
If you want to access this search regularly, you might want to save that search as a Custom View. To do this, expand the Page Display Options, (above the Search Options, at the top of the screenshot above) click Save as Custom View, then give the new custom view a name in the Screen Title before clicking Save Screen Now.