Verify that Windows PowerShell 2.0 or above is enabled on each Windows server where NSM Agents are being installed.
DeployAgents uses Windows PowerShell version 2.0 or above for parsing text, hiding credentials from plain text, and remote installation, but requires that remote signed scripts be allowed.
Verify that the ExecutionPolicy is set to something other than RESTRICTED.
REMOTESIGNED works for deploying MSI files.
Use the Get-ExecutionPolicy PowerShell command to determine how the current policy is set. The Set-ExecutionPolicy RemoteSigned command can be used to change the current policy to one that is compatible with this process.