In the Search Clients pop up, ensure that "Computers" is selected in "Find" drop down listbox.
Do not select any option under "Search Criteria".
Click on Search.
If you have selected the "My Company" group, this will list all the computers reporting to Symantec Endpoint Protection Manager console.
If you have selected a specific group, it will display only the clients belonging to that group.
Click on the Export button which will be active after the search results are displayed.
Confirm the From & To Page numbers.
Click on Browse and select the File Path.
Specify the file name & click OK.
Click on Export.
This will export the file in .txt or .csv format in the location specified.