The following troubleshooting topics are included in this section:

During an activation between your Belden Horizon Data Manager and an edge device, an "activation code not found" message may appear when activate the edge device in Belden Horizon Data Operations > Device Management.

This can happen when the edge device was previously activated for the Belden Horizon Data Manager and the certificate is no longer valid.

To resolve this issue, you must reset the URL in Belden Horizon Data Operations, remove the Belden Horizon Data Manager certificate, and add the URL to Belden Horizon Data Operations again. This pulls the new Belden Horizon Data Manager certificate.

Make sure that the edge device is deactivated.

To reset the URL:

1. Log in to Belden Horizon Data Operations. 2. From the Navigation panel, select System. The Info pane appears. 3. Navigate to Device Management. 4. From the Cloud Activation section, click Reset beneath the URL. The URL is cleared from the Data & Device Management Endpoint field.

To remove the certificate:

1. From the Device Management pane, navigate to Certificates. The Certificates pane appears. 2. Select the Custom CA Certificates tab. The Custom CA Certificates pane appears. 3. Click the Action icon next to the Belden Horizon Data Manager CA entry, and then select Remove Certificate. The Belden Horizon Data Manager CA is removed immediately.

To add the URL: 1. From another browser tab, log in to Belden Horizon Data Manager.

2. Select a company. The Projects pane appears.

3. Do one of the following:

4. From the Navigation panel, select Activation. The Configuration and Requests sub-modules drop down.

5. From the Navigation panel, select Configuration. The Activation Configuration pane appears.

6. Click the Activation code link. The Activation pane opens.

7. Click the Copy icon next to the Activation URL. The Activation URL is copied to your clipboard.

8. Return to the Belden Horizon Data Operations Certificates browser tab.

9. Navigate to Device Management.

10. From the Cloud Activation section, click Edit and paste the URL into the Data & Device Management Endpoint field.

11. Click Set. The Cloud Activation URL updates and the new Belden Horizon Data Manager CA is added to certificates. You can continue with your activation.

During an activation between your Belden Horizon Data Manager and an edge device, a "Failed to Update Cloud Activation URL" message may appear when you paste the activation URL in Belden Horizon Data Operations > Device Management.

This can happen if you used a domain name (DNS) that was unresolved instead of an IP address in Belden Horizon Data Manager Admin Console > Settings. See Domain/SSL for more information.

To resolve this issue, you must verify the domain name you entered in Belden Horizon Data Manager or make sure that the domain name can be correctly resolved by the DNS servers defined in the edge device. To verify the domain name:

1. Log in to Belden Horizon Data Manager Admin Console. 2. From the Navigation panel, select Settings. The Settings pane appears. The Domain/SSL pane by default appears. 3. From the Domain/SSL section, verify that the DNS name entered is correct.

To verify DNS server is resolving:

1. From another browser tab, log in to Belden Horizon Data Operations. 2. From the Navigation panel, select System. The Info pane appears. 3. From the Navigation panel, select Network. The Network pane appears. 4. Click the DNS / NTP Servers tab. 5. From the Fallback DNS Resolvers section, verify that the DNS Resolver IP address is correct.