How to share a file from storage apps like dropbox to Office Chat?

Users can share files from storage apps like dropbox to a conversation in Office Chat. For sharing, the user needs to be first logged in to Office Chat. Before sharing, user is shown a list of their co-workers and groups they are a part of.

Please note that when a file is shared from dropbox, the link to download the file gets shared.

Following video demonstrates an example of how files can be shared from dropbox to Office Chat app: