I have been trying to trace out the source of these events and have narrowed it down (I think) to the Exchange OAB. It looks like when the system tries to access the OAB that it asks the DC about the SystemMailbox account and it responds with "Account Disabled" , which it is in AD. I have included some log information from EWS and the Event message. Any help or guidance would be much appreciated.
Exchange 2013 Standard (Version 15 build 712.24)
From the w3wp.exe_EWS log
2013-12-20T14:59:19.278Z,19731,w3wp.exe,22588,EWS,Search,Success,3,0,0,0,,(&(proxyAddresses=SMTP:SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@mycompany.com)(!(msExchCU=*))(|(objectCategory=person)(objectCategory=msExchDynamicDistributionList)(objectCategory=group)(objectCategory=publicFolder)(objectCategory=msExchPublicMDB)(objectCategory=msExchSystemMailbox)(objectCategory=msExchExchangeServerRecipient)(objectCategory=exchangeAdminService)(objectCategory=computer))(|(&(msExchVersion<=2251799813685248)(!(msExchVersion=2251799813685248)))(!(msExchVersion=*)))(|(!(msExchRecipientSoftDeletedStatus=*))(msExchRecipientSoftDeletedStatus=0)(msExchRecipientSoftDeletedStatus:1.2.840.113556.1.4.803:=8))),SubTree,,DCSERVER.mycompany.local,3268,010fdd6e-d554-4f11-ad0d-5c9efa856803,,,Directory.cs:
Method CreateRootADRecipientSession; Line 28
2013-12-20T14:59:19.356Z,19732,w3wp.exe,22588,EWS,Search,Success,3,0,0,0,,(&(proxyAddresses=SMTP:SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@mycompany.com)(!(msExchCU=*))(|(objectCategory=person)(objectCategory=msExchDynamicDistributionList)(objectCategory=group)(objectCategory=publicFolder)(objectCategory=msExchPublicMDB)(objectCategory=msExchSystemMailbox)(objectCategory=msExchExchangeServerRecipient)(objectCategory=exchangeAdminService)(objectCategory=computer))(|(&(msExchVersion<=2251799813685248)(!(msExchVersion=2251799813685248)))(!(msExchVersion=*)))(|(!(msExchRecipientSoftDeletedStatus=*))(msExchRecipientSoftDeletedStatus=0)(msExchRecipientSoftDeletedStatus:1.2.840.113556.1.4.803:=8))),SubTree,,DCSERVER.mycompany.local,3268,010fdd6e-d554-4f11-ad0d-5c9efa856803,SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@mycompany.com,,Directory.cs:
Method CreateADRecipientSession; Line 287
2013-12-20T14:59:19.371Z,19733,w3wp.exe,22588,EWS,Search,Success,0,0,0,0,"CN=Configuration,DC=mycompany,DC=local",(&(distinguishedName=<GUID=fa12df70-1a81-4de2-bac4-1cfb98ef1653>)(!(msExchCU=*))),SubTree,,EL-SRV-03.mycompany.local,389,010fdd6e-d554-4f11-ad0d-5c9efa856803,SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@mycompany.com,,LocalServer.cs:
Method configSession; Line 24
2013-12-20T14:59:19.371Z,19734,w3wp.exe,22588,EWS,Search,Success,0,0,0,0,"CN=Configuration,DC=mycompany,DC=local",(&(distinguishedName=<GUID=fa12df70-1a81-4de2-bac4-1cfb98ef1653>)(!(msExchCU=*))),SubTree,,EL-SRV-03.mycompany.local,389,010fdd6e-d554-4f11-ad0d-5c9efa856803,SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}@mycompany.com,,LocalServer.cs:
Method configSession; Line 24
Event Viewer
Log Name: Security
Source: Microsoft-Windows-Security-Auditing
Date: 12/20/2013 9:59:19 AM
Event ID: 4625
Task Category: Logon
Level: Information
Keywords: Audit Failure
User: N/A
Computer: MYSERVER.mycompany.local
Description:
An account failed to log on.
Subject:
Security ID: SYSTEM
Account Name: MYSERVER$
Account Domain: MYCOMPANYNET
Logon ID: 0x3E7
Logon Type: 3
Account For Which Logon Failed:
Security ID: NULL SID
Account Name:
Account Domain:
Failure Information:
Failure Reason: Account currently disabled.
Status: 0xC000006E
Sub Status: 0xC0000072
Process Information:
Caller Process ID: 0x583c
Caller Process Name: C:\Windows\System32\inetsrv\w3wp.exe
Network Information:
Workstation Name: EL-SRV-05
Source Network Address: -
Source Port: -
Detailed Authentication Information:
Logon Process: Authz
Authentication Package: Kerberos
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.
Scott