SYMPTOM:
In Strategy Web 10.x, users can manually adjust the padding of textboxes to achieve the desired look and feel of the textbox. For example, the screenshot below shows a textbox in Strategy Web where the top padding was increased.

However, when the report services document is exported to Excel, the padding is removed as seen below.

STEPS TO REPRODUCE:
CAUSE:
This is working as designed in Strategy Web 10.x.
ACTION:
Microsoft Excel has the limitation of padding not being supported.
The Strategy Internal Reference Number for this issue is: KB442207