At first, I was searching from forum but don't find solution to my problem. I have 270 computers with Eset Nod Antivirus 3.0 license which is ending now, I was install new ERAS server and also bought new license "ESS Business" for all computers, I was upgrade and transform all clients in to new ERAS server but after that I get error "License expired". Can somebody give advice what I need to do, I DO NOT want to make those change manually in each computer. Hope that there is solution that i can make changes in ERAS or something similar. Thank you.