Process %1 (PID=%2). An internal memory cache error occurred. A record that was not valid was used with the cache hash table. ...

Process %1 (PID=%2). An internal memory cache error occurred. A record that was not valid was used with the cache hash table. This event can be caused by internal memory issues. You may be able to resolve this event by restarting the Microsoft Exchange Active Directory Topology service. If the error persists, restart the Exchange server that logged this event.