The organization's tab will list all organizations which are mapped with the central branch. The list will have both verified and unverified organizations. There is a reminder button to send out the invitation mail again to the unverified Organisation. There is a feature to add new organizations also.
When you click on an organization that is approved, it will take you to a new page where you can see the files and folders shared with the organization.
The right side panel of the below figure shows the default and custom roles.
On opening each role, you can see the files and folders shared with them.