---
title: Add a Custom CA Certificate
slug: manufacturing-connect-edge-v1/add-a-custom-ca-certificate
docTags: 
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 Manufacturing Connect Edge and other systems.

To create a valid and secure connection between Manufacturing Connect Edge and Manufacturing Connect, a custom CA certificate needs to be generated. To complete this specific task, see [Activate an Edge Device](docId\:XYBwui7dZIU41fGxmzfu6) for details. 

To upload a custom CA certificate not related to validating communication between Manufacturing Connect Edge and Manufacturing Connect, follow the steps below. 

:::hint{type="warning"}
**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 Manufacturing Connect Edge. 

# Add a Custom CA Certificate

**To add a custom CA certificate:**

1. Navigate to **System **> **Certificates**.
2. From the *Certificates *pane, select the **Custom Certificate **tab.
3. Click the **Add **icon. 
   ::Image[]{src="https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/R1Ew_hJkJXrm29KbyTAlq_addcustomcacertificate.png" size="80" width="1403" height="441" caption="Add CA Certificate icon" position="center" showCaption="true"}
4. Navigate to the certificate file (\*.crt) and click **Open**. 
   The new certificate appears in the *Custom Certificates* tab.