Custom SIS connector configurations
The ability to specify custom mappings from your SIS to the generated OneRoster CSVs has been added. This will allow you to choose which field in the SIS will be used for OneRoster fields, or create new metadata fields. For more information, please see the this page. 
New Preprocessor options
A new 'Merge Users' setting has been added that will remove duplicate users based on matching givenName, familyName, and username. The merged users will have a new sourcedId based on a hash generated by the givenName, familyName and username.
New Transform actions have been added to the preprocessor that allow fields to be converted to all lowercase or all uppercase characters.
The ability to add descriptions for preprocessor configs has also been added.
Misc. changes
A confirmation dialog has been added when trying to disable an app. The Classlink app can no longer be disabled.
Invalid grades are now considered an "Error" by Roster Server. Previously, the system would change invalid grades to "Other" in order to let data pass through. Now all grades must conform to the enumeration standard prescribed by CEDS https://ceds.ed.gov/CEDSElementDetails.aspx?TermId=7100