SQL Server 2008 User authentication error on Maintenance Task

Hi there

I have created a Maintenance task in SQL Server 2008 Management Studio.

I followed a walkthrough that seems to me to be entirely correct even if it was for 2005.
(http://www.sql-server-performance.com/articles/dba/creating_backup_jobs_p1.aspx)

But when I try to test the task with Execute command, i receive the following error:

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

On the server I logged in as ServerName\LocalAdminName and connected to the Management Studio with "localhost"

My thoughts:
Do I have to login with a Domain User instead and if so, how do I allow that user to access Management Studio/All the databases? I tried to login with my User Account which is a Domain Admin account, but I was then unable to connect to localhost in Management Studio...

Also: The server has been renamed when it was found necessary to join it to the domain (was not initially planned) and I notice that the server name has not changed under
Security->Logins->ServerName\Administrator
ServerName is still the old servername, and not the new name... I would have thought this would change by itself?

Best Regards
Panthom
PanthomAsked:
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Mark WillsConnect With a Mentor Topic AdvisorCommented:
Well, normally it is the SQL Agent Service owner - ie the identity used to start the services that you have to watch out for. Best if that is a domain user, and add that user to SQL Server as a login and also to the databases. Might consider mixed mode authentication as well...

But I think you now have an added problem with the renamed server and SQL using the servername\instance where that servername no longer exists.

Hate to say it, but unless you get other advice, might in fact be easier to uninstall and reinstall. Let's see what other experts have to say.
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PanthomAuthor Commented:
Had to reinstall as suggested :)
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