SQL Server Analysis Services 2012: Login Failure Events found in Event Viewer

The following events were found while going through the Event Viewer.  I did verify that the SQL Server Analysis Services (MSSQLSERVER) service is using the account 'NT Service\MSSQLServerOLAPService' to run.  So I am not sure where it might be specifying the domain administrator account.  

The error appears to occur every two hours, at about 20 minutes after the hour.

I do not have much experience in Analysis Services (but I do in SQL Server itself).  Analysis Services was set up to be used with MS SharePoint and MS Team Foundation.

As a test, I have disabled reporting in Team Foundation.  Team Foundation was configured to use the specified administrator account for reporting.  So I should know in a few hours if that was the issue.

Thanks in Advance,

- Michael

There error is as follows:

An account failed to log on.

      Security ID:            NT SERVICE\MSSQLServerOLAPService
      Account Name:            MSSQLServerOLAPService
      Account Domain:            NT Service
      Logon ID:            0x25872

Logon Type:                  8

Account For Which Logon Failed:
      Security ID:            NULL SID
      Account Name:            Administrator
      Account Domain:            MYDOMAIN

Failure Information:
      Failure Reason:            Unknown user name or bad password.
      Status:                  0xc000006d
      Sub Status:            0xc000006a

Process Information:
      Caller Process ID:      0x7dc
      Caller Process Name:      C:\Program Files\Microsoft SQL Server\MSAS11.MSSQLSERVER\OLAP\bin\msmdsrv.exe

Network Information:
      Workstation Name:      MYTEAMFOUNDATION
      Source Network Address:      -
      Source Port:            -

Detailed Authentication Information:
      Logon Process:            Advapi  
      Authentication Package:      Negotiate
      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.
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EugeneZ ZhitomirskySQL SERVER EXPERTCommented:
check if your   failed login is still active MYDOMAIN\ Administrator

and clarify and post masked all EV error
this one looks like EV  security one

if all is set ok  for your server SSAS  and system and apps EV logs are clean
and service is running fine
you  should be fine

waiting for your logs clarifications

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mjs082969Author Commented:
The wrong account was being used for Team Foundation Reporting.  

Team Foundation Reporting Configuration
Please see the following document for more information on the report that should be used:

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