The use of an E-mail certificate requires standalone software (not webmail).
For Outlook (XP SP3 at least) use Internet Explorer to request the certificate.
For Mail or Entourage under Mac OS X 10.5+, use Safari to request the certificate.
For Thunderbird 2+, use Firefox to request the certificate.
For SeaMonkey 2+, use the same software to place the request.
According to the Data Protection Act you benefit from the right to access and require rectification of your personal data. You have also the right to object for legitimate reasons to the processing of your data, which may be exercised by contacting firstname.lastname@example.org