![]() Now that, we know SQL server logs all login failed messages into its error log and windows event viewer but how do I access them? To figure out the exact reason, this error number 18456 with its STATE number is logged into the SQL server error log file, if SQL server was allowed or configured to capture the failed logins.Ĭonfiguring SQL server for capturing login failures:īy default, SQL server is configured to capture only failed logins but it can be changed to any of the options as mentioned in this books online link īelow figure shows these options to have login failed messages written into error log This message simply denotes that the client call was able to reach the SQL server and then an ACCESS was denied to the particular login for a reason. This is one of the infamous error message (and number) that most of the DBAs and developers have come across while working on SQL server. Output: Login failed for user ‘%.*ls’.%.*ls%.*ls Input : select * from sys.sysmessages where error = 18456
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