Macros inheritance, does this always work across linked Templates?

[kholliday]

I am considering the use of Template - IIS by Zabbix agent active, which comes with Zabbix 5.4.
Some docs indicate that Template macros can be overriden if same-name macro is present on a parent object, such as a linked parent Template or a host. Does that also apply to this particular template?

https://www.zabbix.com/documentation/current/en/manual/config/macros/user_macros

If I want to define {$IIS.PORT} and {$IIS.SERVICE} values in the parent Template, should I expect them to propagate down to the actual IIS by Zabbix agent template and override any 'default' values seen there? Or would I have to remove those macros at IIS by Zabbix agent to allow parent values to come down? Descriptions on some macros indicate that they *can* be overrriden, but that's not noted on macros {$IIS.PORT} and {$IIS.SERVICE}.

When I tried to do this, it seemed inheritance was not working. When I drill down to the IIS by Zabbix agent as child template from a linked parent, it does not seem to show the port and service values (in Inherited and Template macros tab) from macros specified in the parent.

[cyber]

Such override will work with any template. If you define macro with same name higher in the chain, it will override value from lower in the chain.

Add a template "Child" with one macro inside called {$MACRO1} and value "child"
Add another template called "Parent", with one macro {$MACRO1} and value "parent". Link this template to "Child" template.
Link "Parent" template to a "host". Now if you go to host config and Macros you will see that macro {$MACRO1} has value "parent". So it has effectively overrun the value from "child".