Which two dial plan flexibility features can be enabled in Cisco Unity Connection through the use of partitions and search spaces?

Disabling identical user messaging is a subscriber-level or class-of-service setting in Unity Connection, not a function enabled by partitions and search spaces.

Overlap sending is an ISDN/Q.931 dialing feature configured on voice gateways or CUCM digit analysis, not a Unity Connection partition or search space capability.

Overlapping extensions are supported through partitions, which allow different subscribers in separate partitions to share the same extension without conflict, as call routing is resolved by the associated search space.

Calling party normalization is a CUCM dial plan feature that standardizes incoming caller ID formats, and is not configurable through Unity Connection partitions or search spaces.

Multitenant configurations are achieved by assigning different tenants to separate partitions and search spaces, isolating their dial plans and preventing cross-tenant extension conflicts or unintended access.