I am attempting to update a SysPrepped XP SP3 image. Our ZCM server is at 10.2.1 but the image has the 10.1.2 agent. I have a registration rule that should import this workstation into ZCM but it won't work.

I have tried registering it manually with the "zac reg https://<servername.domain>" command and I get "Unexpected server result. Server code: -34. Server message Invalid Device Authentication Information"

I have tried following some of the information in other threads without success. Is it possible that the server certificate has changed somehow with the 10.2.1 update? This used to work - when I re-imaged a workstation ZCM would add it to the correct management zone and then update the agent version.