Use the following steps in order to hide administrative or system accounts and prevent them from showing up in search results:
- Launch the application settings window by using the right mouse click on the application tray icon and selecting: “Settings”
- In the settings window select the option: “Search result must include phone/mobile”
- Press ok to save your setteings
Once this option is selected clear any values from both the office and the mobile phone fields of these accounts and they will not appear in users search results.