The Sierra application and database servers will be updated to Sierra 1.2.1 on Tuesday, July 15th. There is no downtime required for this update. However, a restart will be required after the install in order to download new SDA (Sierra Desktop Application) software.
This update resolves several reported known issues and includes the new read-only API feature that will all Sierra to interact with other systems.
For more details, click on the Release 1.2.1 link on the Sierra SharePoint