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CLOUD IM IN HA SETUP
Please ensure only one UCM in the HA setup has Cloud IM enabled.
After the active UCM A in HA setup enables Cloud IM, the standby UCM B will synchronize up from UCM A
and obtain Cloud IM service as well. Cloud IM service is always available on the active UCM, and the
associated MAC address will change if active/standby UCM changes. Therefore, failover in HA setup does
not affect Cloud IM service.
If a replacement UCM C has no Cloud IM enabled and it’s used to swap UCM A or UCM B in the HA setup,
after replacement, Cloud IM will still work for the UCM in the HA setup without additional configurations.
However, if the replacement UCM C has Cloud IM enabled before swapping, Cloud IM must be turned off
on UCM C first. The replacement must be done when there is no previous Cloud IM service on UCM C.
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