Hi Zied Ben hriz,
RadUpload does not provide such functionality. Its purpose is to upload files from the client to the server. If you use one of your servers as a client, it would be possible to "upload" to the other server. However, we suggest that you use the .NET WebRequest and WebClient classes in order to achieve this task. There is plenty of sample code on the net, form example here
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items.