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Showing posts from February, 2012

Cannot use the special principal 'sa'. (Microsoft SQL Server, Error: 15405)

Yesterday, I start SQL Server 2005 and try to connect with sa user but was enable to connect with the 'sa' user and got this error:

Cannot use the special principal 'sa' (Microsoft SQL Server, Error: 15405)After doing some google, I found out the solution which I am sharing so that others can get all the possible solutions from this article.
The titled message mean that your sa user is disabled. To enable it, you have to follow below mentioned steps:1) you have to change the authentication mode: go to Management Studio and open Object Explorer. Connect to your server and right-click on the server name, then select Properties. Go to Security tab and under Server Authentication select "SQL Server and Windows Authentication Mode".2) Also, after you follow the directions above, you will also need to explicitly enable the sa account as well. Go to Security->Logins. Right-click on the "sa" account, select "Properties". In the list on the lef…