I have a .NET application that I use to execute PS commandlets on an Azure VMSS instance. To do so, I use the RunPowershellScript commandId and send it over an HTTP Request to the VMSS instance.
A simple script like this works –

 string script = string.Format(
                "$script = @(" +
                "Write-Host Hello {0}!" +
                ")", "John Doe");

However, when I use a PSCustomObject and add it to the Message field, the Message field in the HTTP response payload is empty.

What can I do to ensure that the Message field is populated appropriately.

Note – everything works as expected when I use Azure CLI and I invoke RunPowershellScript command as an HTTP Request.