Active Directory Domain Services did not perform initial synchronizations because the following registry key has been set ...

Active Directory Domain Services did not perform initial synchronizations because the following registry key has been set to disable them. 
 
Registry key: 
HKLM\%1 
Registry value: 
Repl Perform Initial Synchronizations 
 
Verification that each directory partition has successfully synchronized at least once will still be performed. This directory server will synchronize with its replication partners on a normal periodic schedule, but it will not perform an initial synchronization each time it is restarted.