Currently when a user of the Box for Slack app posts a Box file link in Slack, the integration unfurls a content card which contains a filename and optionally a thumbnail of the document. It is also possible to set the integration to upload a textual representation of the document to Slack to be used within its search index.
However, the filename, thumbnail, or text contents of a file in Box may change after it has been shared in Slack.
Therefore we have added Content Sync, a way to keep content cards updated after someone makes a change to the underlying Box file. With this, Box file representation in Slack will be updated for one year after the last time it was shared.
This feature will require Admin activation. Support documentation detailing how to activate this is available within the article Deploying the Slack integration in Your Enterprise.