VERIFIED SOLUTION i
While deploying the reports on SQL Server Reporting Services, SSRS Report Manager web page show an error "User DOMAIN_NAME\userID does not have required permissions. Verify that sufficient permissions have been granted and Windows User Account Control (UAC) restrictions have been addressed."
This error can occur due to lack of Administrative to the user or IE not launched using elevated privileges.
ResolutionUPDATED: September 22, 2017
Start the web Browser (Internet Explorer) with elevated privileges (i.e Run as Administrator) and browse the SSRS Reports web page.