---
title: Add a Custom CA Certificate
slug: bhdo-v2/add-a-custom-ca-certificate
createdAt: 2022-10-07T18:16:08.000Z
---

A CA certificate is a digital certificate issued by a certificate authority (CA). The CA certificate allows valid and secure connections between Belden Horizon Data Operations and other systems.

To create a valid and secure connection between Belden Horizon Data Operations and Belden Horizon Data Manager, a custom CA certificate needs to be generated. To complete this specific task, see [Activate an Edge Device](docId:70-Ge0h0fLr4i8GPrQzb1) for details. 

To upload a custom CA certificate not related to validating communication between Belden Horizon Data Operations and Belden Horizon Data Manager, follow the steps below. 

:::hint{type="info"}
**Important**: When uploading a custom CA certificate, make sure the file is in CRT format and that X509 encoding is used. 
:::

# Before You Begin

Contact your IT team to download any required CA certificates that you will need to upload to Belden Horizon Data Operations. 

# Add a Custom CA Certificate

**To add a custom CA certificate:**

1. Navigate to **System **> **Network**.
2. Click the **Certificate **tab.
3. From the *Custom CA Certificates* section, click the **Add **icon.

   ![](https://api.archbee.com/api/optimize/vAqK-046vdh4I0e1y9cfX/bdSxlea04fdWIqGvWIjgx_add-ca-certificate.png)
4. Navigate to the certificate file (\*.crt) and click **Open**. 
   The new certificate appears in the *Custom Certificates* tab.