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 microsoft sql server error 18456 in sql server 200

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svibuk
Yak Posting Veteran

62 Posts

Posted - 2012-11-21 : 12:15:38
microsoft sql server error 18456 in sql server 2008 r2
login failed for user sa

sql server was working properly

i just restarted the system and then i started getting the above error
how do i resolve it

i am able to login with windows authentication but not sql authentication

prett
Posting Yak Master

212 Posts

Posted - 2012-11-21 : 23:08:46
I found a good Microsoft article on this error, Please read it:
http://msdn.microsoft.com/en-us/library/cc645917.aspx
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HenrikMezei
Starting Member

1 Post

Posted - 2014-12-03 : 07:26:00
Read something useful om this site unspammed
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Shanky
Yak Posting Veteran

84 Posts

Posted - 2014-12-05 : 06:34:20
Since you just said you restarted the system. Can it be possible somebody changes authentication mode to windows Only. Please check

Hope this helps

Regards
Shanky
SQL Server MVP
http://social.technet.microsoft.com/wiki/contents/articles/24253.list-of-articles-by-shanky.aspx
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