I'm finally going to upgrade here. I have one primary server (SLES 10.2) and about 300 managed devices. Once I upgrade ZCM on the server, should I immediately upgrade all managed devices, or can I do 50 or 100 at a time? In other words, will the 10.2 clients talk to the 10.3 server?

Also, anything I should look out for that isn't covered in the docs? Thanks.