MongoDB has released new features for its Managed Service, MMS, including the addition of SHA-1 checksum files to ensure data integrity during restores. Customers with sharded clusters can now take snapshots and clustershots even if the balancer is on, providing an added layer of availability and peace of mind. The company also introduced restore file size estimations in the MMS web UI for improved monitoring and auditing capabilities. Additionally, new features have been added to the activity feed to provide more context about host status and alert types.