A non-modal notification user interface element is displayed persistently but unobtrusively such that a user may easily determine that authentication credentials are required by a background synchronization process. The non-modal notification is configured such that it may be ignored by the user such that their workflow is not interrupted. The background synchronization continues to synchronize the data it can even though the background synchronization may require authentication credentials for a subset of the data to be synchronized. The user may select the non-modal notification user interface element at any point in time in order to supply the required authentication credentials. The non-modal notification is removed from the display when there are no further authentication credentials required.