I have one user that is locked out of AD. He is an existing user that has had this account for a long time. If I unlock his AD account, it is relocked within a minute or two. It appears Exchange is causing it to lock. I have turned off his computer, disconnected his iPhone and iPad from Exchange. I turned off OWA and active-sync and yet the problem continues. I cannot find any errors in the DC events but the following is in the Exchange security event logs:
An account failed to log on.
Security ID: SYSTEM
Account Name: SAA-EXG$
Account Domain: MyDomain
Logon ID: 0x3e7
Logon Type: 3
Account For Which Logon Failed:
Security ID: NULL SID
Account Name: User's Name
Failure Reason: Unknown user name or bad password.
Sub Status: 0xc000006a
Caller Process ID: 0xafc
Caller Process Name: I:\Program Files\Microsoft\Exchange Server\Bin\EdgeTransport.exe
Workstation Name: EXCHANGE SERVER NAME
Source Network Address: -
Source Port: -
Detailed Authentication Information:
Logon Process: Advapi
Authentication Package: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
This event is generated when a logon request fails. It is generated on the computer where access was attempted.
The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.
The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on the system requested the logon.
The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.
The authentication information fields provide detailed information about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
What am I missing?