SQL Event 18456 during file backup of SQL server
Article ID: 100028899
Updated On:
Description
Error Message
Log Name: Application
Source: MSSQLSERVER
Date: 3/13/2013 5:00:14 AM
Event ID: 18456
Task Category: Logon
Level: Information
Keywords: Classic,Audit Failure
User: DOM\BEACCT
Computer: SERVERNAME.DOM.COM
Description:
Login failed for user DM\BEACCT. Reason: Token-based server access validation failed with an infrastructure error. Check for previous errors. [CLIENT: ###.###.###.###]
Cause
When the file backup of a SQL server is initiated, the SQL agent, even if not licensed or used, will query SQL server to determine what databases are active so that their database files can be excluded from the file backup. If the account used for backup has no access to SQL server, this file exclusion information cannot be obtained and SQL server may create events when the access attempt is made.
Resolution
The account used by Backup Exec for SQL server file backups should have access to all SQL instances present so that the automatic exclusions can be created.
Issue/Introduction
If the file system of a SQL server is backed up but the Backup Exec SQL agent is not licensed/used and the account used for the file backup has no access to SQL, events 18456 may be present from SQL server.
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