Some versions of Exchange send directory replication requests 5 minutes after the Directory Service starts.

To alter this behavior:

. Upgrade to the latest Exchange Service Pack for your version.

. Use regedt32 to navigate to:

   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeDS\Parameters

   Add Value name Replicator inter site sync at startup as a type REG_DWORD. Set the data value:

      0 - Prevents replication at startup.

      1 - Replication occurs 5 minutes after Directory Service startup.

Stop and Start the Directory Service for this change to take effect.