Action required! This domain has consumed a considerable portion of the total available account-identifiers (RIDs). A protection ...

Action required! This domain has consumed a considerable portion of the total available account-identifiers (RIDs). A protection mechanism has been activated because the total available account-identifiers remaining is approximately: %1. 

The protection mechanism prevents the allocation of account-identifier (RID) pools needed to allow existing DCs to create additional users, computers and groups, or promote new DCs into the domain.  The mechanism will remain active until the Administrator manually re-enables account-identifier (RID) allocation on the RID master domain controller. 

It is extremely important that certain diagnostics be performed prior to re-enabling account creation to ensure this domain is not consuming account-identifiers at an abnormally high rate. Any issues identified should be resolved prior to re-enabling account creation. 

Failure to diagnose and fix any underlying issue causing an abnormally high rate of account-identifier consumption can lead to account-identifier (RID) pool exhaustion in the domain after which account creation will be permanently disabled in this domain. 

See http://go.microsoft.com/fwlink/?LinkId=228610 for more information.