We explored another aspect of host properties in Zabbix: host inventory. Host inventory may be manually populated, but the more useful aspect of it is its ability to receive values from any item in any inventory field. This still allows manually editing inventory fields that do not receive values from items.
Host and Host group maintenance allows us to create on-time or recurring maintenance entries on a daily, weekly, and monthly basis. Problems on hosts that are in maintenance are distinguished visually in the frontend, and in many views, we can also choose not to show such problems at all.
It's important to remember the main rules about permissions in Zabbix:
Permissions can be assigned to user groups only
Permissions can be granted on host groups only
This means that for fancy permission schemes, you might have to do some planning before starting to click around. We can also safely say that to avoid mysterious problems in the future, every host should be in at least one host group...