This Solution applies to all versions of Ivanti Service Manager (current version, on the date when this article is created is 2017.3)
Whilst creating/using Remote Host Connection (Admin UI -> Extend -> Integration Tools -> Remote Host Connection), after pressing Test Connection button, appears error message: The provided URI scheme 'http' is invalid; expected 'https', Parameter name: via
The provided URI scheme 'http' is invalid; expected 'https', Parameter name: via
Either Application Server uses SSL, but it should not
WinRM has not been configured to listen over HTTPS.
Option 1: Application Server uses SSL, but we want to connect without SSL.
Open System Configuration Wizard, go to Other Feature Settings and deselect "Use SSL".
Please do not forget that clicking Next will restart Ivanti Service Manager services.
Option 2: WinRM has not been configured to use SSL.
Open Powershell with Administrator privileges and run: Winrm enumerate winrm/config/listener
If there is only one listener with Transport = HTTP, it means that HTTPS listener has not been configured.
In this case please refer to: Run Program - Remote Host and create HTTPS listener.