Add -Whatif to MSOnline Cmdlets

Set-MsolUserLicense.ps1

Function Set-MsolUserLicense
{
    [CmdletBinding(DefaultParameterSetName='SetUserLicenses__0', SupportsShouldProcess=$true)]
    param
    (
        [Parameter(ParameterSetName='SetUserLicenses__0', Mandatory=$true, ValueFromPipelineByPropertyName=$true)]
        [guid]
        $ObjectId, 
        [Parameter(ParameterSetName='SetUserLicensesByUpn__0', ValueFromPipelineByPropertyName=$true)]
        [Parameter(ParameterSetName='SetUserLicenses__0', ValueFromPipelineByPropertyName=$true)]
        [AllowEmptyCollection()]
        [Microsoft.Online.Administration.LicenseOption[]]
        $LicenseOptions, 
        [Parameter(ParameterSetName='SetUserLicensesByUpn__0', Mandatory=$true, ValueFromPipelineByPropertyName=$true)]
        [string]
        $UserPrincipalName, 
        [Parameter(ValueFromPipelineByPropertyName=$true)]
        [string[]]
        $AddLicenses, 
        [Parameter(ValueFromPipelineByPropertyName=$true)]
        [string[]]
        $RemoveLicenses, 
        [Parameter(ValueFromPipelineByPropertyName=$true)]
        [System.Nullable[guid]]
        $TenantId
    )
 
    process
    {
        switch ($PSCmdlet.ParameterSetName)
        {
            'SetUserLicenses__0' {$Processor = $ObjectId}
            'SetUserLicensesByUpn__0' {$Processor = $UserPrincipalName}
        }
        if ($PSCmdlet.ShouldProcess($Processor))
        {
            $wrappedCmd = $ExecutionContext.InvokeCommand.GetCommand('Set-MsolUserLicense', [System.Management.Automation.CommandTypes]::Cmdlet)
            $scriptCmd = {& $wrappedCmd @PSBoundParameters}
        }
    }
}