Assume that you use a Maintenance plan that runs on a recurring schedule as a SQL Server Agent job to back up a database in Microsoft SQL Server 2016. If the credentials of the jobs SQL connection are a SQL user name and a password, then the job completes successfully but you will receive error messages that resemble the following in the SQL Server log:
DateTime Logon Error: 18456, Severity: 14, State: 8.
DateTime Logon Login failed for user 'UserName'. Reason: Password did not match that for the login provided. [CLIENT: <LocalMachine>]
Note If the plan is executed by Windows authentication, then the job completes successfully with no error messages in the SQL Server log.
This issue is fixed in the following cumulative update for SQL Server:
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