Starting with this release, you can import new or update existing work items using MS Excel in your production Clarizen environment. Prior to the update, it was only supported for Sandbox environments.
In addition, when reviewing data in the inline data import wizard, you can update data using copy and paste. To copy data, select a cell and press the Ctrl+C (for Windows) or Command+C (for iOS) keyboard shotcuts, then paste it to a desired destination cell.
For more information on how to import or update data using MS Excel, refer to Importing or updating data using MS Excel.