Strange event log messages

[Pigboy]

I am getting an Event ID 529 in the error logs on my Exchange Server. The account is used for the Arcserve Brick level backup, but the backup logs indicate that all mailbokes are backed up.

This error is also popping up on other accounts not associated with the backup

Any input would be greatly appreciated, all of the MS articles I could find yeilded no relevant information.

Oink,
Pigboy

Logon Failure:
Reason: Unknown user name or bad password
User Name: <backup agent account>
Domain: <server name>
Logon Type: 3
Logon Process: Advapi
Authentication Package: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
Workstation Name: <server name>

 

[xmsre]

It's a local account. The clue is DOMAIN: <server name>.

http://support.microsoft.com/default.aspx?scid=kb;en-us;811082