Fix Windows Time Sync with w32tm

Fri, 22 May 2026 10:00:00 +0530

Purpose

Windows system clock drifting or refusing to sync. This script detects whether the machine is domain-joined and takes the correct NTP path automatically — no manual branching needed.

Approach

If domain-joined → restore AD hierarchy sync (fighting domain policy with internet NTP is a support ticket waiting to happen)
If workgroup/standalone → configure public NTP peers and force resync

The Script

Run as Administrator:

$isDomainJoined = (Get-CimInstance Win32_ComputerSystem).PartOfDomain

if ($isDomainJoined) {
 Write-Host "Domain-joined — syncing from AD hierarchy" -ForegroundColor Cyan
 w32tm /config /syncfromflags:domhier /update
 Restart-Service w32time
 w32tm /resync /force
} else {
 Write-Host "Workgroup machine — configuring public NTP" -ForegroundColor Cyan
 w32tm /config /manualpeerlist:"time.google.com time.cloudflare.com pool.ntp.org" /syncfromflags:manual /reliable:no /update
 Restart-Service w32time
 w32tm /resync /force
}

If Resync Fails

Re-register the Windows Time Service, then re-run the script above:

Windows Server on Vibhu Bhatnagar — PowerShell & Infrastructure Engineer

Fix Windows Time Sync with w32tm

Purpose

Approach

The Script

If Resync Fails