Disable NetSuite's Fax Integration With eFax or Faxaway

To disable NetSuite's fax integration with eFax® or Faxaway®:

1. Go to Setup > Company > Printing & Fax 
2. Go to the Fax tab
3. Delete the email set in the Registered Email Address field
4. Click Save

Once the registered email is removed, users won't be able to fax from NetSuite anymore.