FortiClient and Sandbox

Hi guys,

We are about to order a heap of FG units. Currently we use Sandbox cloud, but are looking at an on SaaS Sandbox for all our clients (We are a MSSP)

The question we cant get answered tho, if you point a forticlient to sandbox, and the user is behind FGT, sandbox scans the file.

What about if the user takes the laptop home. Does Sandbox still intercept the file and scan it before the user can access it? This would be without sending all traffic through the FGT.

Thanks in advance.