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Event ID: 1578 Source: NTDSReplication

Promotion of this server to a Global Catalog has been delayed because partition occupancy requirements have not been met.

A parameter is used to control the strictness that the Directory enforces the partition occupancy requirement. The parameter is

Local Machine \ Current Control Set \ Services \ NTDS \ Parameters \ Global Catalog Partition Occupancy

The levels are as follows: (0) No occupancy requirement; (1) At least one readonly partition in site added by the KCC; (2) At least one partition in site synchronized fully; (3) All readonly partitions in site added by the KCC (at least one synchronized); (4) All partitions in site synchronized fully.

Greater levels include the requirements of lesser levels. The current occupancy requirement is 6.  This server is currently at level 4.
See ME842208, ME889711, and the link to "EventID 1578 from source Active Directory" for details on this problem.
This message is preceded by 1559 and succeeded by 1110. The events relate to an attempt to promote a server to a Global Catalogue server. The GC promotion is failing due to a problem pulling a replica of a child domain from any child domain DCs. See ME910204 for additional information about this situation.

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