I use ZCM 10.1 on Windows 2003.
I have several Vista SP1 French workstations.

Worksations do not register to the server.

zac -k vista -u administrator -p ********* https://myserverurl

I get :

Code : -21, message: Could not determine device type from <OS> tag: unsupported

This version on ZCM is supposed to support Vista SP1.

Thanks in advance.