Is there a way to either:
1- You can modify the Customer Portal header on the JSD Configuration(JIRA Administration > Add-ons > JIRA Service Desk Configuration) also described here: https://confluence.atlassian.com/display/SERVICEDESK/Configuring+the+Customer+Portal#ConfiguringtheCustomerPortal-portalbrandBrandingyourportal
2- You can use the Restrict Access as the following link: https://confluence.atlassian.com/display/SERVICEDESK/Opening+up+or+restricting+access+to+your+service+desk
...be more productive while being fun to use at the same time. For some, getting started can be a bit intimidating. This is especially true if Jira Service Desk is your first exposure to Atlassian...
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