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PowerShell (Microsoft) FAQ

Management With PowerShell

Waiting for ID Replication Within Active Directory by markdmac
Posted: 18 Sep 14

Take Action After ID Replicates
I've been working on a GUI based PowerShell script that simplifies user creation at my company. The script locates the least used Exchange database, creates a mailbox, reads from an AD template and joins the user to a number of groups depending on the selected template, applies additional group memberships and creates a Lync account. There is a lot going on and I was struggling with the code completing because of a slight delay in the user ID being visible to the script despite specifying the domain controller to create the ID on. I determined I needed to add in some code that simply waits until the ID can be located. Below is the simple wrapper code that searches a given Domain Controller for a given username and waits until it is found before performing the next actions. I thought this would be useful as a snippet for others that might be writing similar tools in PowerShell.


$DC = "TekTipsDC01"
$Stoploop = $false
$testUser = $null
$alias = "UsernameToSearchFor"
do {
    try {
        write-host "Waiting for ID"
        $testUser = Get-ADUser "$alias" -Server "$DC"
        $Stoploop = $true
    catch {
        if ($testUser -ne $null){
            Write-Host "ID Found - Code to Execute Goes In This Section"
            $Stoploop = $true
     else {
            Write-Host "Could not find, retrying in 5 seconds..."
            Start-Sleep -Seconds 5
While ($Stoploop -eq $false) 

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