If your ribbon is not customized, a Paste button is available both in the Standard and in the Advanced menu set of JChem for Excel, Word, Powerpoint, and Outlook.
Select a few structures and data in IJC and right-click on the selected area, click Copy to MS Office.
Press the Paste button in any of the JChem for Office applications.
The data copied from IJC is displayed on the selected sheet or document.
The paste will start in the Excel cell, which was selected on the sheet before pasting.