1. How to use the "External link" filed of the card?
1.1 The External link field is an easy way to add a reference to an external Kanbanize source.
For example: a web page that might be relevant to the task/project.
1.2. You can use the default External link field to link Kanbanize as a tracking software to your Local file server or a SharePoint server.
Card Title: Review Customer Contract
External Link: smb://intranet/fileserver/contracts/c03345.doc
1.3 The "External link" value is used as a unique identifier, so the import would know which cards to update.
In order to successfully update your existing cards via the Import, when you format the Excel column headers to match the cards fields you want to update -> you need to create a column header named: "External link" where the cells' input must match the "External link" fields value of the cards you want to update.
2. How to make the "Еxternal link" visible at the closed card view?
To make the external link visible at the initial card view -> use the grid menu at the upper right corner of your board interface -> select Configure Card View.
Select Show external link (Icon or Full text) from the Card/Board settings panel.
This action makes the external link field visible in the initial card view, so every user can easily follow the link without opening the card.