Follow these steps
If the clients are Managed , Go to SEPM, Symantec Endpoint Protecion Manager
Click on Policies tab
click on Antivirus and AntiSpyware
click on edit
in the quarentine option.. click on cleanup
select when you want to delete those.
There are 2 options to delete the quarantine files. Option A 1. Open SEP Client Interface 2. Click View Quarantine 3. Click Purge options 4. Enter the no of days u want to keep the quarantine files 3. Enter the size of the quarantine folder. Option B 1. Login to SEPM Console 2. Click Policies 3. Select Antivirus & Antispyware Policies 4. Click Quarantine 5. Select Cleanup tab 6. Check the box Enable automatic deleting of quarantine files that could not be repaired 7. Keep the limit to 3 days
Regards...
Ramji Iyyer