Then click Yes (if UAC prompt received) and check if the SQL server is clear of the error 18456.Launch Microsoft SQL Server Management Studio as Administrator Now right-click on SMSS and select Run as Administrator.Click Windows and type SQL Server Management Studio.
You may encounter the error 18456 if the SQL server does not have the elevated permissions to execute its operation and launching it as administrator (or disabling the UAC controls on the server) may solve the problem. Launch the SQL Server as Administrator and Disable UAC on the Server Last but not least, make sure the server’s clock and client computer clock is correctly set. If you are seeing the errors in the SQL errors log, then make sure your SQL server is not under attack. Furthermore, check if unlocking the account (by using the query ALTER LOGIN WITH PASSWORD= UNLOCK) solves the issue. Moreover, make sure you are typing the correct username and password (not copy-pasting the address).Īlso, check if you are entering the correct database name (no typo in it) and make sure you have updated the configuration file accordingly. You can fix the SQL server error 18456 by trying the solutions below but before that, check if restarting the server, client computer, and networking computers solves the issue. The issue arises when the user tries to connect to the SQL server (local or remote) but encounters the error 18456 (with different states). You may encounter the SQL Server Error 18456 if the server could not authenticate the connection and this can be caused by the non-availability of the administrator rights to the SQL server or if the TCP/IP protocol is disabled in the SQL server settings.
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