See SQL Server Reporting Services Reports without logging in? I have installed SQL Server 2015 with SSRS and I have some reports I need to run, but in order to access http://reportsserver/Reports I need to start Internet Explorer in administrator mode.

This is clearly suboptimal: any user would need to know the Administrator password.

How do I set up SSRS to not require auth to see reports, or how can I make users not need to run IE in Administrator mode?
You only have to run in Administrator mode because you haven't added any users to SSRS. You need to grant permissions. For example on the root folder in SSRS add a windows user/group to the Browser role.

For more details see https://technet.microsoft.com/en-us/library/ms156014%28v=sql.110%29.aspx