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Event ID: 1559 Source: NTDSReplication

Level
Description
A request has been made to promote this DSA to a Global Catalog (GC). A precondition to becoming a GC is that this server host a read-only copy of all partitions in the enterprise. This server should hold a copy of partition DC=child,DC=h,DC=com but it does not. This system will not be promoted to a GC until this condition is met.
This may be because the KCC has not run, or that it is unable to add a replica of the partition because all of its sources are down. Please check the event log for KCC errors.
The KCC will retry adding the replica.
Comments
 
This event occurs when promoting a domain controller to a global catalog server. See ME810089 and ME910204 for additional information about this event.
See ME842208, ME889711, and the link to "EventID 1559 from source Active Directory" for details on this problem.

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