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Event ID: 16645 Source: SAM

Source
Level
Description
The maximum account identifier allocated to this domain controller has been assigned. The domain controller has failed to obtain a new identifier pool. A possible reason for this is that the domain controller has been unable to contact the master domain controller. Account creation on this controller will fail until a new pool has been allocated. There may be network or connectivity problems in the domain, or the master domain controller may be offline or missing from the domain. Verify that the master domain controller is running and connected to the domain.
Comments
 
ME316201 and ME839879 provide information on this event.
Please see ME325700 for cause and fix.

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