Have you ever come across a situation where you cannot see/find the rsreportserver.config file related to Reporting Services?
You are 100% sure that Reporting Services is installed and it works fine without any issue. Then why does not it appear in searches with file explorer?
Generally, path for the file is: C:\Program Files\Microsoft SQL Server\MSRS12.SQL2014\Reporting Services\ReportServer. If you navigate through this path without searching;
You can find it. And once found, searches starts working too.
The reason for this is security. You will notice that when you navigate the folders, it asks administrations rights and you need to accept it for continuing. Since it is sensitive file and a system file, it cannot be discovered using general searched.