Event ID - 1123

Event Id1123
SourceMSExchangeSRS
DescriptionThe consistency checker failed to delete a replica of naming context <object name> to nonexistent directory <directory name> with error <error code>.
Event InformationThe Knowledge Consistency Checker could not delete a replica that points to an invalid destination server. A replica is a copy of a public folder that resides on another server and is specified in the Replicas property page of a public folder object. The Knowledge Consistency Checker checks for the existence of other connected servers within a site and for the existence of new sites within the organization. It also sets up the required replication links with any new servers or sites.

For solution you can stop and restart the site replication service.
Reference LinksMicrosoft product: Exchange Version: 6.0 Event Source: MSExchangeSRS Event ID: 1123

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