What should you modify first?

Restricted
– Default execution policy in Windows 8,
Windows Server 2012, and Windows 8.1.
RemoteSigned
– Scripts can run. This is the default execution
policy in Windows Server 2012 R2.

https://technet.microsoft.com/en-us/library/hh847748.aspx

Windows PowerShell execution policies let you determine the
conditions under which Windows PowerShell loads configuration files
and runs scripts.

You can set an execution policy for the local computer, for the current
user, or for a particular session. You can also use a Group Policy
setting to set execution policy for computers and users.

Execution policies for the local computer and current user are stored
in the registry. You do not need to set execution policies in your
Windows PowerShell profile. The execution policy for a particular session
is stored only in memory and is lost when the session is closed.

The execution policy is not a security system that restricts user actions.
For example, users can easily circumvent a policy by typing the script
contents at the command line when they cannot run a script. Instead, the
execution policy helps users to set basic rules and prevents them from
violating them unintentionally.

C – set execution policy on client computers

Server 2012R2’s default execution policy is remotesigned which allows signed scripts. Workstations are set with “restricted” by default.

http://windowsitpro.com/powershell/use-execution-policies-control-what-powershell-scripts-can-be-run

https://blog.netspi.com/15-ways-to-bypass-the-powershell-execution-policy/