Installing the correct CMS version on the original server simplifies the logistics of creating a new HA configuration for the following reasons:
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Configure Communication Manager for the correct CMS version and dual ACD links before deploying the new HA server on-site. Maintain the unused Communication Manager system link in a busied-out condition until the new HA server becomes operational.
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The original server either does not require a software upgrade or requires a base load upgrade to match the new HA server installation.
Achievement of a synchronized system requires minimal or no software installation, followed by one or two maintenance backups and restorations between the two servers. The servers are not entirely synchronized due to operational differences between the primary and secondary servers.
