Where is data stored, contractual obligations with customers

Hi,

We have pulled data into Power BI from our SQL server. Im currently buidlign the reports and dashboards, however for several of our customers we have contractual obligations that their data can not be stored off shore. 

If i am based in the UK and we publish dashboards or reports, where will that data be stored? Is it the entirety of the SQL data we have pulled in that will be stored?

Thanks