Why can’t I log in with my email address?

Make sure the email address you are using for Security Cloud Sign On matches the email associated with your Secure Email Threat Defense account. Some customers may have Security Cloud Sign On accounts using multiple email addresses. Secure Email Threat Defense does not support multiple email addresses for a single user. You must log in using the email address that was used to create your Secure Email Threat Defense account. If you don’t know which email address was used, check with your Secure Email Threat Defense administrator.