/v - Displays verbose output regardless of whether the command runs successfully or fails, and displays warning messages.
/a - Automatically selects the best signing certificate. Sign Tool will find all valid certificates that satisfy all specified conditions and select the one that is valid for the longest time. If this option is not present, Sign Tool expects to find only one valid signing certificate.
/n SubjectName - Specifies the name of the subject of the signing certificate. This value can be a substring of the entire subject name.
/t URL - Specifies the URL of the time stamp server. If this option (or /tr) is not present, the signed file will not be time stamped. A warning is generated if time stamping fails. This option cannot be used with the /tr option.
/d - Desc specifies a description of the signed content.