An administrator provisioned a MongoDB sharded cluster but cannot use Time Machine.

Current NDB support for MongoDB sharded clusters requires MongoDB Ops Manager for Time Machine functionality. The administrator must install and configure a supported Ops Manager instance, register it with NDB, and associate it with the provisioned sharded cluster. Time Machine must then be enabled for that cluster. Without this association, NDB reports that Time Machine capabilities are unavailable because the required sharded-cluster backup and transaction-management integration has not been established. Nutanix Guest Tools are not the prerequisite that activates MongoDB Time Machine. Option A reflects an older limitation and is incorrect for the NDB release aligned with the NCP-DB 7.5 objectives, because sharded-cluster Time Machine protection is now supported. Nutanix explicitly identifies the Ops Manager requirement in its official MongoDB Ops Manager registration documentation.