It is possible to copy and paste single structures by pressing Ctrl+C in Excel, then pressing Ctrl+V in another MS Office application. For this to work, Options > Event Handling > Keyboard Events > Ctrl+C and Ctrl+V runs JChem for Office Copy/Paste must be set to TRUE. It is also possible to copy an IDSYSStructure from an Excel worksheet by pressing Ctrl+C, then paste it to another MS Office application by pressing Ctrl+V.
On an Excel worksheet, select a cell containing a structure and press Ctrl+C, then open PowerPoint, Word, or Outlook and press Ctrl+V. The live structure will be pasted to the current application, which can be edited by double-clicking on it.