I have two instances of Dynamics 365 CRM (Unified Interface). In Instance 1, When searching for some data it uses the Quick Find View in the entity itself. But in Instance 2 it uses some unknown Search Results View and fetches data from all the Views.
Note: Both the Instances are of same version.
How is it taking this Search Results View and where can I find it?


Yes, this is a new feature in 2020 release wave 1 - search happens in current in view rather than across the entity via Quick find.
Reference