This guide walks you through the process of updating an existing mapping with the Salesforce.com and JIRA Connector.
Step-by-Step Guide
Go to the Mapping Configuration Interface.
Under the Actions column of the configured mapping you want to update, click Edit.
You should be brought to a screen very similar to the initial screen used to add the mapping which will allow you to modify the details of the mapping. Note that only the name and description can be updated.
Update the fields as required and click Update to save your changes.
You should be brought back to the first screen with the changes visible.