Automate SQL Server 2008 backup script failing to run

I have created a maintenance plan but when I try to execute I get the error:

Message
[298] SQLServer Error: 15404, Could not obtain information about Windows NT group/user 'XX\Administrator', error code 0x534. [SQLSTATE 42000] (ConnIsLoginSysAdmin)

I have given administrator db owner access but still get the error, what am I doing wrong?

Usually when this happens you just need to edit the job and save it again. This will “usually” fix the problem.

Failing that try changing it to run under a SQL Account such as the sa account so that it doesn’t need to check for domain credentials before running the job.

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