---
title: "FIX FOR: Entra ID join error code 8018000a – This device is already enrolled"
description: "​Encountering the Azure Active Directory (Azure AD) join error code 8018000a, accompanied by the message \"This device is already enrolled,\" is a common hurdle for IT professionals transitioning Windows 10 devices to Azure AD. This error typically arises when a…"
url: "https://prof-it.services/docs/fix-for-entra-id-join-error-code-8018000a-this-device-is-already-enrolled/"
updated: "2025-03-03"
category: Admin Manuals
---

# FIX FOR: Entra ID join error code 8018000a – This device is already enrolled

​Encountering the Azure Active Directory (Azure AD) join error code 8018000a, accompanied by the message "This device is already enrolled," is a common hurdle for IT professionals transitioning Windows 10 devices to Azure AD. This error typically arises when a user has previously registered the device by selecting "YES" during an Office 365 application login, linking a work profile to the device. While beneficial for individual use, this registration can impede subsequent attempts to join the device to Azure AD. ​

**A Simple Solution Using PowerShell**

To mitigate these challenges, a more efficient solution involves using a PowerShell script to clear residual enrollment information without affecting user profiles. This method focuses on specific registry keys and scheduled tasks associated with device enrollment.​

**Open PowerShell as Administrator**: Right-click on the Start menu, select "Windows PowerShell (Admin)."​

**Run the Script**: Copy and paste the above script into the PowerShell window and press Enter. Follow the on-screen prompts to remove the detected device registrations.

**Re-attempt Azure AD Join**: After the script completes, reboot and try joining the device to Azure AD again.​

```
##This script checks for devices registered to AzureAD and removes them so you can successfully perform an AzureAD join.
# We recommend you backup your registry prior to running. We take no responisbility for the use of this script.

$sids = Get-ChildItem 'HKLM:SOFTWAREMicrosoftEnterpriseResourceManagerTracked' -name |where-object {$_.Length -gt 25}

Foreach ($sid in $sids){

Write-host "Found a registered device. Would you like to remove the device registration settings for SID: $($sid)?" -ForegroundColor Yellow
    $Readhost = Read-Host " ( y / n ) "
    Switch ($ReadHost)
     {
       Y {Write-host "Yes, Remove registered device"; $removedevice=$true}
       N {Write-Host "No, do not remove device registration"; $removedevice=$false}
       Default {Write-Host "Default, Do not remove device registration"; $removedevice=$false}
     }

if ($removedevice -eq $true) {

$enrollmentpath = "HKLM:SOFTWAREMicrosoftEnrollments$($sid)"
$entresourcepath = "HKLM:SOFTWAREMicrosoftEnterpriseResourceManagerTracked$($sid)"

##Remove device from enrollments in registry

$value1 = Test-Path $enrollmentpath
If ($value1 -eq $true) {

write-host "$($sid) exists and will be removed"

Remove-Item -Path $enrollmentpath -Recurse -confirm:$false
Remove-Item -Path $entresourcepath -Recurse -confirm:$false

}
Else {Write-Host "The value does not exist, skipping"}

##Cleanup scheduled tasks related to device enrollment and the folder for this SID

Get-ScheduledTask -TaskPath "MicrosoftWindowsEnterpriseMgmt$($sid)*"| Unregister-ScheduledTask -Confirm:$false

$scheduleObject = New-Object -ComObject Schedule.Service
$scheduleObject.connect()
$rootFolder = $scheduleObject.GetFolder("MicrosoftWindowsEnterpriseMgmt")
$rootFolder.DeleteFolder($sid,$null)

Write-Host "Device registration cleaned up for $($sid). If there is more than 1 device registration, we will continue to the next one."
pause

} else { Write-host "Removal has been cancelled for $($sid)"}
}

write-host "Cleanup of device registration has been completed. Ensure you delete the device registration in AzureAD and you can now join your device."Code language: PowerShell (powershell)
```

*Note: Always ensure you have backed up the registry before making any modifications. Use the script at your own discretion and risk.*

Credits to anspired.com.au for this script.