You can only include Jira Custom Fields in exported Tempo Timesheets Logged Time reports with Download raw data option. Follow the steps below to enable this feature: Server/DC Data Center - Go to Jira System Administration - Add-ons - Tempo - Custom fields and check the fields that you want to be included when you export reports to Excel or XML formats.  Cloud - Go to Tempo Settings - Configurations - Custom Fields, click the Enable export button and then check the fields that you want to be included when you export reports with Download raw data option.  | 
