Expired Accounts life cycle

Running as scheduled task does not include a approval so not 100% sure how i can do this 

I would use more than one workflow. A scheduled workflow to run daily and check virtual attributes that  contains data such as dates, or days. Then I'd create another workflow based on virtual attribute changes, then initiate the approval from there. 

Thanks, 

Yes i had come to the same conclusion and approach and started to work down that path so thank you validating my thinking. 

I am trying to reuse the script Stu.Pollock provided which works great in a new user workflow. I am trying to use this in a scheduled task workflow.

The plan is the workflow will run on a schedule. it searches a AD group that contains all the accounts i want to check the accountexpires on. If it find an account and the script returns true then set the VA on the workflow to TRUE

When the workflow runs it displaying the error 

function Convert-Int8ToDateTime($Request)
{
    $MaxDays = 21

    $EvalDate = (Get-Date).AddDays($MaxDays)
   
    $Int8 = $Request.get("accountExpires")
    $Return = "FALSE"
   

    if($Int8)
    {    
        if([DateTime]::FromFileTimeUTC($Int8) -ge $EvalDate)
        {
            $Return = $TRUE
            #throw "TRUE"
        }
    }
    
    return $Return
}