We have some T5735 clients that have stopped connecting to our Citrix server. A couple have failed and seem unable to connect, I unboxed a new one and it's having the same problem. We have another 7 devices that are all working fine and they're all on the latest OS release.
All I get is an error "Client error invalid serial number"
I seem to remember seeing this before but can't remember why. Has anyone seen this?