For all planned full and partial DR switchbacks, the Omnichannel DB servers in both locations are not failed and data is mirrored between each other. After a planned switchback, mirroring is from the DR (DC2) site to the original primary (DC1) site.

For unplanned switchbacks due to Omnichannel failures, reinstate the failed servers first and then reinstate mirroring. Before starting the switchback, read the later chapters of this document to find out how to reinstate a failed Omnichannel server.

Verify that mirroring is enabled from the DR to primary servers before a switchback. This is a baseline requirement before starting a switchback.

The Omnichannel database replicates data from DC2 to DC1 after a planned switchover using Cache Mirroring from DR to the primary. If this was an unplanned switchover due to failures, then Omnichannel Database does not replicate any data, and you must reinstate its replication capabilities after completing the switchback to DC1.

Omnichannel DB must have its replicating function validated before attempting a switchback. Failure to perform this validation can lead to issues during the switchback process.

For more information, see procedure in Verifying the Omnichannel Database mirroring status.