[...]<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> The first option: define host { name windows-server hostgroups windows-server ... register 0 } define host { use windows-server hostgroups +ABC-server ... }</blockquote><div> Well, I have (and I need) an ABC-server template because I inherits other values related to all the machines in the ABC-server hostgroup (such as notes_url which points to a troubleshooting Wiki page related to ABC project) So now I do like this : I have a windows-server template, an ABC-server template, and when I define a new host, I use both templates and I redefine in the host the hostgroups value : define host{ use windows-server,ABC-server hostgroups +ABC-server ... } </div> which means : use the hostgroups from windows-server template, ignore the hostgroups from ABC-server template, add to the inherited hostgroups "ABC-server" So I have to add the ABC-server hostgroup ownership to each host belonging to this hostgroup. <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> The second option: define host{ name windows-server hostgroups windows-server ... register 0 } define host { name ABC-server use windows-server hostgroups +ABC-server ... register 0 } define host { use ABC-server ... }</blockquote><div> This option is not good for me because ABC-server hostgroup may have linux-server : define host { use windows-server,ABC-server ... } and define host { use linux-server,ABC-server ... } (and each hostgroup has a different set of services checked) </div> </div> Thanks -- L.B.