Factory Reset VVX 300 through provision server.

Hi,

We have around 400 Polycom VVX 300 phones which is already configured with random data's.

Now we have planning to use all these phones for Lync server with unique configuration pushed through provision server.

Before uploading new config file, we would like to do a mass factory reset to erase all the random data's.

Is there any way to do this through provision server, instead of doing 400 phone manual factory reset?

Thank You.