The Bitbucket Support plugin are various tools to help administrators support Bitbucket. At presently, the only bit of functionality in this plugin is a rest interface used to trigger a sync of external user directories. This is helpful a an automated tool can be setup to granting permissions through a remote directory then inform bitbucket via the rest interface to sync up.
Visit /rest/bitbucket-support/1.0/directory/sync to trigger the sync.
Related links to "Keysight Admin Tools for Bitbucket"