Dynamic params - Invoking script from admin page

Product: PowerShell Universal
Version: 1.4.6

Is anyone doing anything with dynamic params?

For instance I have an item in a paramset that if you pick it from the dropdown I would like to require another param to set. I know you could do this with pages but was wondering if you could do it from admin page when invoking the script?

[CmdletBinding()]
param(
    [Parameter(Mandatory = $false, HelpMessage = 'Select that actions you want to perform')]
    [ValidateSet('retentionpolicy-update', 'emailaddresses-update')]
    [String[]]
    $Actions
)

DynamicParam {
    $paramDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary

    if ($Actions -contains 'emailaddresses-update') {
        $paramName = 'NewEmailAddress'
        $attributes = New-Object System.Management.Automation.ParameterAttribute
        $attributes.Mandatory = $true
        $dynParam = New-Object System.Management.Automation.RuntimeDefinedParameter($paramName, [string], $attributes)
        $paramDictionary.Add($paramName, $dynParam)
    }
    $paramDictionary
}

process {
    # Access the $NewEmailAddress parameter here if 'emailaddresses-update' is in $Actions
    if ($Actions -contains 'emailaddresses-update') {
        Write-Host "New Email Address: $($NewEmailAddress)"
    }