Hi Kevin,
Currently, the RadUpload does not support upload to Azure storage. However, you can vote for implementing this
here. Authentication can be performed by sending tokens between the client and the server side, however, it does not have any protection. Any encryption would have to be done manually.
Ideally, the saving behavior of the handler can be intercepted and can be overriden. The RadUploadHandler exposes virtual methods that can be overriden so that this behavior is changed. You can see instructions on how to achieve this
here.
Regards,
Alex Fidanov
the Telerik team
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