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Maria FernandoMaria Fernando 

Has anyone found a way to work around "Grant Access Using Hierarchy" for standard objects? I want to control access tot the opportunity object and was unpleasantly surprised when I could not do that

Best Answer chosen by Maria Fernando
SwethaSwetha (Salesforce Developers) 
HI Maria,
The scenario of "grant access using Hierarchies "  for standard objects is not yet possible as per https://help.salesforce.com/articleView?id=security_controlling_access_using_hierarchies.htm&type=0 and there is no workaround for this.

The "Grant Access Using Hierarchies" option is always selected on standard objects and is not editable."

Please consider posting your upvoting the below ideas on Idea exchange so that the product team can implement it in coming releases based on the number of upvotes.
Links: 
https://success.salesforce.com/ideaView?id=08730000000DjsKAAS
https://success.salesforce.com/ideaView?id=0873A000000E4phQAC

Hope this helps you. Please mark this answer as best so that others facing the same issue will find this information useful.Thanks