This scheduled maintenance window is necessary to apply updates to servers running Cobalt indices. Normally this kind of maintenance window would have zero impact, but since Cobalt indices lack replication, they will be fully offline for the duration of the maintenance window.
We recognize that we have some customers running production workloads on Cobalt plans. To avoid any interruption in service, we recommend that any such production indices be upgraded to a Chromium or other production-grade plan with replication, and our systems will migrate your indices to production-level server hardware. For any questions, please contact firstname.lastname@example.org