I have tested this in two different environments and I get the same result. I believe this is a regression from previous versions.
Here are the steps to reproduce my problem:
1) create a form
2) add a datasource, ie CustTable
3) add a grid to the design
4) add a fieldgroup to the grid, ie "Identification" (drag and drop from fields)
5) compile and run form
The grid should load data from customer table and you should be able to press CTRL+T to export the content directly to Excel. This works in CU6 but not in CU7, as far as I can tell.
Here is an example of two forms. The first will support Export to Excel, while the second will not:
Anyone else experiencing the same thing?