Instructions :

From The 2.14.xxx versions, the only thing to pay attention is the configuration file of the provconnect agent on the new image that is going to be installed on the device.  The installation file is located here per default : “C:\Program Files (x86)\ProVConnect\ProVConnect Device Agent\Device Agent\bin\Wanpulse.config” 

Please follow the following steps :

1. Make sure that the Server communication URL is properly configured :  <add key=”Communication.Url” value=”https://MYSERVERURL:443” /> It will ensure that the agent will be able to communicate with the server 
2. Remove the following line if possible <add key=”Agent.Last.Identity” value=”Device_SID&DeviceMacAddresses” /> It will make the identification of the devices easier for the server

For device agents with versions prior to 2.14, it’s mandatory to update them before starting the reimaging process, to ensure that the server and the agent will still be able to communicate properly together.