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This permission controls whether a user can access the Excel Online issue export feature. Users without this permission will still see the Excel Online export button on the issue list page, but receive an Access Denied screen after clicking on the button. By default, any logged in user has this permission.
Excel Online Integration - Set Realtime Update
This permission controls whether a user can set a sheet's update schedule to "Realtime". Users without this permission will only be able to create exports that are updated manually. By default, any logged in user has this permission.