---
title: "Use an Existing Certificate"
slug: "v5useanexistingcertificate"
tags: ["Microsoft Management Console", "Add or Remove Snap-ins ", "Certificates snap-in", "Use an Existing Certificate", "Thumbprint "]
updated: 2026-05-06T02:30:16Z
published: 2026-05-06T02:30:16Z
canonical: "help.12dsynergy.com/v5useanexistingcertificate"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.12dsynergy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Use an Existing Certificate

Admin Content

1. Log in to the Server on which the existing certificate to be re-used has been installed.
2. Click the **Windows Start** button, type **Run** and select the **Run** app. Alternatively, press the **Windows** + **R** keys together.
3. Type **mmc**. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-18mahhg9.png)
4. Click the **OK** button. The **Microsoft Management Console** window is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-0108lhi5.png)
5. In the **File** menu option, select the **Add/Remove Snap-in** option. The **Add or Remove Snap-ins** prompt is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-f9n37xtw.png)
6. In the **Available Snap-ins** section, click the **Certificates** snap-in.
7. Click the **Add >** button. The **Certificates snap-in** prompt is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-mnec6jpj.png)
8. Select the **Computer account** option and then click the **Next** button. The **Select Computer** prompt is displayed. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-3z22odsv.png)
9. Select the **Local computer** option and click the **Finish** button. In the **Add or Remove Snap-ins** prompt, the **Certificates (Local computer)** snap-in is moved to the **Selected snap-ins** section. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-nutrny57.png)
10. Click the **OK** button.
11. In the **Microsoft Management Console** window, navigate to **Console Root > Certificates (Local Computer) > Personal > Certificates** and locate your certificate and double-click it. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-57shrv1r.png) The **Certificate** dialog is displayed.
12. Click the **Details** tab.
13. Select the **Friendly name** field. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/fname.png)

> [!NOTE]
> If you are working with [ACME](/v1/docs/whatisacme), then selecting the **Friendly name** field is preferred. Thumbprint is NOT preferred.
14. Copy the value of the **Friendly name** from the box displayed below the list in the above prompt.
15. In the **12d Synergy Administration** application, select the **System Settings tab > SSL Certificates tab > Use an Existing Certificate tab**.
16. Paste the value of the friendly name in the **Certificate Identifier** box and click the **Set** button. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/sslc1(1).jpg)
17. Restart the **12d Synergy Server** service by doing the following:
  1. Click the **Windows Start button > Run** prompt **>** type **services.msc**. Alternatively, press the **Windows+R** keys simultaneously and then type **services.msc**. The **Services** window is displayed.
  2. Right-click the **12d Synergy Server** service and select the **Restart** option. ![](https://cdn.document360.io/36833d89-59e3-46a5-b491-e9aa1b524a85/Images/Documentation/v5useanexistingcertificate-image-fz714svh.png)

The 12d Synergy Server service is restarted, and the new certificate is loaded.