题

I am facing this issue that, it's disabled enter image description here

有帮助吗？

解决方案

You are currently in the site settings interface of a top-level site, the top-level site doesn’t have a parent site so it can't display the same navigation items as a subsite site.

You can enable this option in a subsite. If you are in a subsite, it will display as below: enter image description here

其他提示

For Site collection does not have the parent, so navigation will not inherit from parent. But in the subsite this option must be enabled because subsite have the parent site

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