What is the maximum number of users that can be imported into Cisco Unity Express from Cisco Unified Communications Manager Express at one time?

The Cisco Unity Express platform enforces a hard limit of 200 users per import batch from CUCME. This limit is documented in the CUE administration guide and applies to the JTAPI-based user synchronization process to prevent overloading the CUE module during provisioning.

100 is incorrect - it is exactly half the actual documented maximum of 200 users per import operation.

500 exceeds the supported single-operation import limit and would not be accepted by the CUE system.

50 is far below the actual maximum and does not reflect any documented CUE import restriction.