Help with Powershell script to gather eventlogs from all Domain Controllers

I am trying to write a script to grab the last 5 days of application, security and system logs from all domain controllers. The script runs but only pulls the logs from the local server. The $Computer variable has all of my DC's so it is querying fine. I assume it is an issue with my ForEach-Object line but it doesn't error out. See the script below.

$log = "Application"
$date = get-date -format MM-dd-yyyy
$now = get-date
$subtractDays = New-Object System.TimeSpan 5,0,0,0,0
$then = $Now.Subtract($subtractDays)
$Computers = Get-ADDomainController -filter *

ForEach-Object -InputObject $Computers  -Process {Get-EventLog -LogName $log -After $then -Before $now -EntryType Error | select EventID,MachineName,Message,Source,TimeGenerated | ConvertTo-html | Out-File $env:TEMP\Applicationlog.htm}

Invoke-Expression $env:TEMP\Applicationlog.htm

Thanks,

Rich