TopicActive Directory →
Event ID 4740. — Locked user account
What does this error mean?
Active Directory locked an account after repeated authentication failures.
Probable causes
- Obsolete registered password
- RDP session
- planned service or task
Verification and resolution
- Identify Caller Computer Name
- Search 4625 on source
- Check services, readers and tasks
Precaution: Unlocking without finding the source often causes a new lock.