---
title: Configure a Local NTP Server
slug: manufacturing-connect-edge-v2/configure-a-local-ntp-server
docTags: 
createdAt: 2022-09-27T14:31:49.000Z
---

Devices rely on an internet time server and a clock source, such as a GPS satellite, to synchronize time across devices. However, in an offline scenario where devices are not connected to the internet, time synchronization must be achieved using a local Network Time Protocol (NTP) server.

If you require a local NTP server:

- Check with your IT team. An NTP server may already be provisioned.
- If an NTP server is not already available, create a Windows-based NTP server by following the steps below.

# Before You Begin

- A Windows server running Windows 7, 8, or 10 is required. Procedures listed on this page have been tested using Windows 10. Other Windows versions may have a slightly different workflow.
- You must have Administrator privileges to configure the Windows server.
- Requires a basic understanding of Windows registry. Caution should be used when updating the registry.

# Configure a Local NTP Server

To configure a local NTP Server, you will need to do the following:

- Step 1: Configure Windows Time Service
- Step 2: Update Windows Registry to Create Local NTP Service
- Step 3: Update Windows Registry to Configure Time Provider
- Step 4: Update Windows Registry to Configure Announce Flags
- Step 5: Start Local Windows NTP Time Service

To jump to a specific section, refer to the Table of Contents on the right side and click the corresponding step. 

## Step 1: Configure Windows Time Service

**To configure the Windows Time Service:**

1. In the File Explorer, navigate to: **Control Panel\System and Security\Administrative Tools**.
2. Double-click **Services**. Alternatively, enter **services.msc** in the Windows Run dialog (Windows Key + R).
3. In the *Services *list, right-click **Windows Time **and click **Stop**. The Windows Time service may already be stopped. In this case, skip this step and proceed to the steps below.
   ::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/cjJr7UgFPDTOamN6aT1Kl_ntpconfigwindowsservices.png" size="80" width="925" height="889" caption="The Windows Time service" position="center" showCaption="true"}

## Step 2: Update Windows Registry to Create Local NTP Service

**To create a local NTP service:**

1. Launch **Windows Run** (Windows Key + R).
2. Enter **regedit **and click **OK**.
3. Navigate to the registry key: **Computer\HKEY\_LOCAL\_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters**. If you don't see *LocalNTP REG\_DWORD* in the list, continue with the following steps. If you do see it, keep the Registry Editor open and proceed to the next task. 
4. Right-click in the Registry Editor, select **New**, select **DWORD**, and enter **LocalNTP **(note that this name is case sensitive). 
   ::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/cmhgvasxB62biEFYcjzMn_ntpconfigwindowsregistrycreatenew.png" size="80" width="997" height="525" caption="Create New DWORD item" position="center" showCaption="true"}
5. Double-click **LocalNTP**, change the *Value data *to **1**, select a *Base *of** Hexadecimal**, and click **OK**.
6. Keep the Registry Editor open for the next task. 

## Step 3: Update Windows Registry to Configure Time Provider

**To configure the time provider:**

1. Navigate to the registry key: **Computer\HKEY\_LOCAL\_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders**
2. Select **NtpServer**, double-click **Enabled**, change the *Value Data* to **1**, select a *Base *of **Hexadecimal**, and click **OK**.
   ::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/7eVoLNT4X_CP6ixehEqW8_ntpconfigwindowsregistrytimeprovider.png" size="80" width="999" height="531" caption="Edit DWORD Value dialog box" position="center" showCaption="true"}
3. Keep the Registry Editor open for the next task. 

## Step 4: Update Windows Registry to Configure Announce Flags

**To configure the announce flags:**

1. Navigate to the registry key: **Computer\HKEY\_LOCAL\_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config**
2. Double-click **AnnounceFlags**, change the *Value data* to **5**, select a *Base *of **Hexadecimal**, and click **OK**.
   ::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/8CnwDhfbjT24Nak72vZE1_ntpconfigwindowsregistryannounceflags.png" size="80" width="1000" height="529" caption="Edit DWORD Value dialog box" position="center" showCaption="true"}
3. Close the Registry Editor.

## Step 5: Start Local Windows NTP Time Service

**To start the local Windows NTP Time Service: **

1. In the File Explorer, navigate to: **Control Panel\System and Security\Administrative Tools**.
2. Double-click **Services**.
3. In the Services list, right-click **Windows Time **and select **Properties**.
4. In the *Windows Time Properties (Local Computer)* dialog box, select a *Startup type *of **Automatic**, click **Start **for *Service status*, and click **OK**. 
   ![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/Cz2NNmyhLtuRqKM0NQDua_ntpconfigstartwindowstime.png "The Windows Time Properties dialog box")

The local NTP Time Server configuration is now complete. You can now synchronize the time of other computers and devices on your local network.

# Synchronize Time on Devices

In order for devices on your local network to communicate with this new local time server, you must know the IP address of the Windows NTP Time Server.

**To synchronize the time on devices:**

1. *On the Windows server* that you just configured as an NTP server, go to the **Windows Command Prompt**, enter: **ipconfig**.
2. Locate the **IP address of the NTP server**.
3. Go to either the Manufacturing Connect Edge Web UI or the Terminal User Interface (TUI) and enter the address of the local NTP server. 
   - To use the Manufacturing Connect Edge Web UI, update the *NTP Servers*. See [Configure DNS/NTP Servers](docId\:ss6IuHoVZJYaj_MAmbD1l) to learn more. 
   - To use the TUI, update the *Configure Time* setting. See [Access the Terminal User Interface](docId:_fOI09WtUWyqVdWwk20id) to learn more. 
     ::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/osabnYypK518ViRg9nPUg_loopedgetuitimentpconfiguration.png" size="80" width="745" height="514" caption="Configure NTP section in Terminal User Interface" position="center" showCaption="true"}