When your certificate is issued, you will receive a ZIP file via e-mail from Trustwave. Within that ZIP file are two important files - one ends in .cer and the other is called xroot.crt. Extract both files. Open the .cer file in a suitable text editor, like notepad, and copy it to the clipboard. Copy the entire certificate - including the top and bottom dashed lines - and paste it into the first large text box. Click "Upload" to save it.