When can duplicated discovery data occur with a MID server?

Duplicated discovery data can occur when a failover MID Server reinitializes. This situation arises because failover scenarios are designed to ensure continuous operations if the primary MID Server becomes unavailable. During this process, both the primary and the failover MID Server might attempt to discover the same devices or services, particularly if they have not coordinated or if the primary has not fully released control before the failover occurs. As a result, both servers may report similar or identical findings to the ServiceNow instance, leading to duplicated data entries.

The other options primarily describe scenarios or configurations that do not directly lead to the duplication of discovery data in the same way. For example, having multiple active MID Servers (the first choice) does not inherently create duplication as they can be configured to function in a coordinated manner. Running outdated versions of the MID Server may lead to inefficiencies or issues but does not specifically cause duplication of data. Likewise, configuring discovery schedules typically helps in managing how discoveries are initiated but isn’t directly related to causing duplicated data entries.