We have some data in Azure that cannot leave the European jurisdiction during a REST call. Do you have an endpoint server in Europe? If not, where are your servers located?
This is to update you that Aspose for Cloud production servers are located on Amazon in US-WEST-2. Furthermore you are using Windows Azure Storage as mentioned by you, the file will not be stored anywhere other than Azure storage account. In addition to the above, we do not store local copies of the files.