---
title: Connections
slug: litmusedge/product-features/opc-ua-server/certificates
description: The Certificates pane allows you to manage clients that connect to the OPC UA server using certificate-based authentication.
docTags: 
createdAt: 2022-05-13T18:58:52.000Z
---

The *Connections *pane allows you to manage clients that connect to the OPC UA server using certificate-based authentication. See [Manage OPC UA Authentication](docId:7ms-yCNakmMOYCquS1WiD) for more information. 

For a certificate-authenticated OPC UA client to work, the OPC UA server must accept (trust) that client's requests.

You can add and refresh an OPC UA client connection, view, refresh and remove client certificates, and manually download the OPC UA server certificate.

If you are using the Docker version of Litmus Edge and having issues connecting to the OPC UA server, refer to [Issues Connecting to OPC UA Server](docId\:Fve9ZDQxYktq2Bm0mg1JE). 

# Access OPC UA Connections UI

**To access the OPC UA Connections pane: **

1. Log in to Litmus Edge.
2. From the Navigation panel, navigate to **OPC **>** Connections**.
   The *Connections *pane appears. 

![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/bBYQ1ApdYYQ4yOt05Dr-T_image.png "The Connections pane")

# Next Steps

- [Add an OPC UA Client Connection](docId\:Y03E-i1ItOcP7XUfl6e2R)
- [Add an OPC UA Server Connection with UA Expert Client](docId\:yPDsY1BLpd4UMOW7tHzb_)
- [Download the OPC UA Server Certificate](docId:2le38kRCPVktiIiDXiVAw)
- [Manage OPC UA Certificates](docId\:BURXwn-4l3zy_QtP34Tu3)
- [View Active Sessions](docId\:aGyAdXzHbD7RX5nQhIiEe)