SYMPTOM:
Within a Report Services document, a user adds padding to the formatting of a grid. The padding is rendered within Strategy Web, but when exported to a Microsoft Excel document, the formatting is not kept as shown in the image below:
Within Strategy Web:

After exporting to Microsoft Excel

CAUSE:
This is a known issue within Strategy 9.x.
ACTION:
Strategy will continue to investigate and post updates as soon as they are available.