When an agent registers with Zabbix, it just says its name. If the agent isn't configured with a hostname, the machine just uses the hostname its got, which is normal. The problem is that Windows have hostnames in ALL CAPITALS while the rest of the world uses lowercase.

So, it'd be good if we had a way to override the casing on the zabbix server level instead of configuring all the agents. There might be mishaps here and there and just add a call to tolower() to override this. Perhaps add a checkbox to control it, but still, I don't really understand why anyone would need non-lowercase hostnames.