Migrating Jobs to be executed in Talend Administration Center - 7.3

Talend Data Integration Migration and Upgrade Guide

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Talend Data Integration
Talend Activity Monitoring Console
Talend Administration Center
Talend Artifact Repository
Talend CommandLine
Talend Data Preparation
Talend Data Stewardship
Talend Identity and Access Management
Talend JobServer
Talend Log Server
Talend Runtime
Talend Studio
Installation and Upgrade

As a security measure to prevent accidental or malicious modification of Jobs, from Talend 7.1 onwards, when saving a task or receiving a generated Job from the Talend CommandLine, the Talend JobServer will verify whether it has a valid signature before running it. You will need to migrate existing unsigned Jobs within a grace period of 90 days upon setting your license for Talend Administration Center, or set a migration token for them if you still want to run or migrate them after the grace period.

Warning: You will get the following error message when you execute unsigned Jobs in your new Talend Administration Center.
This job was created by an unsupported version of Talend Studio. Talend cannot guarantee the origin of such 
artifacts which may pose a security risk to your system. Please contact Talend Support for further details 
about supported versions and our support policies.