Network Management

NCM Backup Jobs Failing with an error "Unable to connect to polling engine <server name> on the relevant server"

Getting an error Unable to connect to polling engine abcxyz123 on the relevant server. Check logs for details

First published date

5/29/2025 2:44 AM

Last published date

2/23/2026 4:18 PM

Overview

Screenshots of the error on UI.

Product section

Network Configuration Manager

Cause

The issue is caused by a username that is not authenticating successfully to the archive folder defined in Config Archive Folder Locations.

Resolution

To confirm that NCM is granted the necessary write permissions for the config archive location, allowing successful validation of the configuration archive, follow the steps:

Navigate to Settings > All Settings > NCM Settings > Advanced Settings

Change the credentials to a username account that should test successfully.

Next, navigate to Settings > All Settings > NCM Settings > Config Settings.
Verify if the configuration is now validating properly in the Config Archive.

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