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Last Updated: 13 Mar, 2022
  • Microsoft SQL Server Error 18456 SOLVED! | Liquid Web Knowledg...
  • MSSQLSERVER_18456 - SQL Server | Microsoft Docs
    • MSSQLSERVER_18456 - SQL Server | Microsoft Docs
    • https://docs.microsoft.com/en-us/sql/relational-databases/errors-events/mssqlserver-18456-database-engine-error
    • When a connection attempt is rejected because of an authentication failure that involves a bad password or user name, a message similar to the following is returned to the client: quot;Login failed for user 'lt;user_namegt;'. (Microsoft SQL Server, Error: 18456)quot;. Additional information returned to the client includes the following: quot;Login failed for user 'lt;user_namegt;'. (.Net SqlClient Data Provider)quot; ------------------------------ quot;Ser...
  • Microsoft SQL Server Error 18456 SOLVED! | Liquid Web ...
    • Microsoft SQL Server Error 18456 SOLVED! | Liquid Web ...
    • https://www.liquidweb.com/kb/troubleshooting-microsoft-sql-server-error-18456-login-failed-user/
    • If you find Windows Authentication is the only mode configured, this is the likely cause of Error 18456, Login failed for user ‘lt;usernamegt;’. Setting the Server authentication mode to allow SQL Server and Windows Authentication , you will be able to login to MS-SQL with a SQL user and password or a Windows user and password.
  • How To Fix Login Failed for User Microsoft SQL Server ...
    • How To Fix Login Failed for User Microsoft SQL Server ...
    • https://channel9.msdn.com/Blogs/raw-tech/How-To-Fix-Login-Failed-for-User-Microsoft-SQL-Server-Error-18456-Step-By-Step
    • The generic message quot;Login Failed for User (Microsoft SQL Server, Error: 18456)quot; means you entered invalid credentials when logging into SQL Server.
  • Login failed for user (Microsoft SQL Server, error 18456 ...
    • Login failed for user (Microsoft SQL Server, error 18456 ...
    • https://www.data-recovery-solutions.com/blog/login-failed-for-user-microsoft-sql-server-error-18456/
    • The error code indicates a failed login attempt which may be occurred due to several reasons. Though, the foremost reason for getting such Microsoft SQL Server error code 18456 could be a ...
  • Login Failed for user '' - Microsoft Q&A
    • Login Failed for user '' - Microsoft Q&A
    • https://docs.microsoft.com/answers/questions/133709/login-failed-for-user-39lttoken-identified-princip.html
    • The error quot;`Microsoft SQL Server, Error: 18456 lt;token-identified-principalgt;`quot; means that the user used to login to SQL Server Management Studio is invalid. It is usually related to an AAD user which is not added on SQL DB that you are trying to connect (User DB or Master DB) or that the AAD user is not the AAD Server Admin.
  • connection - Login to Microsoft SQL Server Error: 18456 ...
    • connection - Login to Microsoft SQL Server Error: 18456 ...
    • https://stackoverflow.com/questions/20923015/login-to-microsoft-sql-server-error-18456
    • SQL Authentication not enabled: If you use SQL Login for the first time on SQL Server instance than very often error 18456 occurs because server might be set in Windows Authentication mode (only). How to fix ?
  • SQL Server error 18456 login failed for user SA
    • SQL Server error 18456 login failed for user SA
    • https://sqlservergeeks.com/sql-server-error-18456-login-failed-for-user-sa/
    • The error – SQL Server error 18456 login failed for user sa may occur because of different reasons. The first step to get it resolve is to check the SQL Server error log. I tried to replicate the ...
  • How to Fix Login Failed to SQL Server - Error 18456/18452 ...
  • How to Resolve Microsoft SQL Server Login Failed Error 18456?
    • How to Resolve Microsoft SQL Server Login Failed Error 18456?
    • https://www.sqlserverlogexplorer.com/fix-microsoft-sql-server-login-failed-error-18456/
    • Microsoft SQL Server login failed error 18456 can be encountered due to varied reasons. When this error occurs, the server name entered is correct, but because of some unanticipated reasons, the permission to login cannot be granted. This error can be confronted in spite of the SQL Server edition or its type (Enterprise or Express) in use.
  • Fix SQL Server Error 18456 Login Failed for User by Server ...
    • Fix SQL Server Error 18456 Login Failed for User by Server ...
    • https://www.systoolsgroup.com/updates/fix-microsoft-sql-server-error-18456-login-failed-for-user/
    • However, user login does not exist in the SQL Server database. It is also a situation when the Windows Authentication mode is set to SQL login. But the user login is an unrecognized Windows principal. It means that Windows is unable to verify the SQL login ID. This situation when Windows login is from an un-trusted domain connection.
  • How to Fix Login Failure SQL Server Error Code 18456?
    • How to Fix Login Failure SQL Server Error Code 18456?
    • https://www.datarepairtools.com/blog/login-failure-sql-server-error-code-18456/
    • The error says “Login failed for ‘username’” with error code 18456. By reading this error, any user can infer that there is some issue in login of the SQL Server and check out this error code resemblance online which says authentication failure generally.
  • Understanding "login failed" (Error 18456) error messages ...
    • Understanding "login failed" (Error 18456) error messages ...
    • https://techcommunity.microsoft.com/t5/sql-server/understanding-quot-login-failed-quot-error-18456-error-messages/ba-p/383045
    • If the server encounters an error that prevents a login from succeeding, the client will display the following error mesage. Msg 18456, Level 14, State 1 , Server lt;server namegt;, Line 1 Login failed for user 'lt;user namegt;'
  • ODBC Data Source SQL Server Connection - Login Failed For User
    • ODBC Data Source SQL Server Connection - Login Failed For User
    • https://dba.stackexchange.com/questions/29992/odbc-data-source-sql-server-connection-login-failed-for-user
    • The login also contains the exact properties of the same login in my old server. When I hit next after entering the username and password I get: Connection failed: SQLState: '28000' SQL Server Error: 18456 [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user 'myUser'.
  • Login failed for [SQLSTATE 28000] (Error 18456) the step ...
    • Login failed for [SQLSTATE 28000] (Error 18456) the step ...
    • https://sqlserver-dba.co.uk/sql-server-admin/login-failed-for-sqlstate-28000-error-18456-the-step-failed-sql-server.html
    • Resolution: First if this message is caused by SQL Agent Job connection then we will need to check the source SQL server agent service account name from Services MMC or Server manager or SQL Server Cofiguration Manager in Services-gt; Go to the SQL Server Agent Service –gt; properties –gt; Check the logon tab where we can find the account name.
  • Datamaker: SQL Server Error 18456- Login failed for user
    • Datamaker: SQL Server Error 18456- Login failed for user
    • https://knowledge.broadcom.com/external/article/9197/datamaker-sql-server-error-18456-login-f.html
    • Cannot connect using supplied values. Connection failed: SQLState: '28000'. SQL Server Error: 18456. [Microsoft] [SQL Server Native Client 11.0] [SQL Server]Login failed for user lt;usernamegt;\lt;servernamegt;. Steps to reproduce: 1. Launch Datamaker by right-clicking on the icon and choosing the 'Run as elevated' option. 2.
  • Sql server error 18456 – Troubleshoot Login Failed
    • Sql server error 18456 – Troubleshoot Login Failed
    • https://www.get-itsolutions.com/sql-server-error-18456/
    • Check out that the login is enabled. Open SSMS, Instance – Security – Logins and find the user that have issue; On status tab and check if is selected the “Enabled” option Reset the Password of the user. If you forget your password, you can ask your DBA to reset your account.
  • login failed for user c# 18456 - social.msdn.microsoft.com
    • login failed for user c# 18456 - social.msdn.microsoft.com
    • https://social.msdn.microsoft.com/Forums/en-US/2fc0b062-8bf9-4952-abf9-ebcd6af8945c/login-failed-for-user-c-18456
    • login failed for user c# 18456. ... How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step. SQL Connection Strings. Thanks, Sabah Shariq [If a post helps to resolve your issue, please click the quot;Mark as Answerquot; of that post or click quot;Vote as helpfulquot; button of that post. By marking a post as Answered or Helpful, you ...
  • Troubleshooting Login failed Error 18456 – SQL-Articles
    • Troubleshooting Login failed Error 18456 – SQL-Articles
    • http://sql-articles.com/articles/troubleshooting/troubleshooting-login-failed-error-18456/
    • 18451. Login failed for user ‘%.* ls ‘. Only administrators may connect at this time.%.*ls. 18452. Login failed. The login is from an untrusted domain and cannot be used with Windows authentication.%.*ls
  • SQL SERVER - FIX Error 18456, Severity: 14, State: 5 ...
    • SQL SERVER - FIX Error 18456, Severity: 14, State: 5 ...
    • https://blog.sqlauthority.com/2016/09/08/sql-server-fix-error-18456-severity-14-state-5-login-failed-user/
    • Some errors are historic and have the most common root cause. Sometimes we really don’t know why they happen and I have seen clients go nuts to identify the real reason for the problem. In a recent email interaction with one customer – who was migrating from Oracle to SQL Server. He kept telling me that they were getting login errors from their Java application. And even when they used the ...
  • Fix SQL Error 18456: Login failed for user - YouTube
  • Fix SQL Server Error 18456: Login failed for user 'User_Name'.
    • Fix SQL Server Error 18456: Login failed for user 'User_Name'.
    • https://techyaz.com/sql-server/troubleshooting/login-failed-user_name-microsoft-sql-server-error-18456/
    • Initially, I thought login failed error 18456 was reported because user might have entered wrong password, but when I tried it with correct password.
  • How to resolve the login failure SQL Server error code ...
    • How to resolve the login failure SQL Server error code ...
    • https://www.nucleustechnologies.com/blog/error-sql-server-error-starting-esri_sde-service-93-dbms-error-code-18456/
    • Now expand Security gt; Logins and right-click the server name, and select Properties.; In the Login properties dialogue box, provide the password details (under SQL Authentication).; Now go to the Status tab, and choose Enabled under Login.; Click OK and restart the SQL server.; But if you want to use the ‘Windows authentication’ option, then it will be better if an administrator provides ...
  • Troubleshooting Error 18456 – SQLBlog.org
    • Troubleshooting Error 18456 – SQLBlog.org
    • https://sqlblog.org/2020/07/28/troubleshooting-error-18456
    • Login failed for user 'lt;xgt;'. I have not experienced this issue but I suspect it involves overloaded connection pooling and connection resets. I think you will only see state 28 prior to SQL Server 2008. 38: Error: 18456, Severity: 14, State: 38. Login failed for user 'lt;xgt;'. Reason: Failed to open the database specified in the login properties. or
  • Error 18456 in Azure SQL : Cannot connect to .database ...
    • Error 18456 in Azure SQL : Cannot connect to .database ...
    • https://www.itexperience.net/error-18456-in-azure-cannot-connect-to-database-windows-net/
    • Here’s how to do so: In Connect to Server window, select tab Connection Properties. In the Connect to database field, click the dropdown arrow. This will list all databases you have access to. Select the database. Click Connect.
  • How To Fix Login Failed For User Microsoft Sql Server ...
    • How To Fix Login Failed For User Microsoft Sql Server ...
    • https://webfyimpressions.com/how-to-fix-login-failed-for-user-microsoft-sql/
    • However, DLLs are in the same format as EXEs and some may even use the .EXE file extension. While most Dynamic Link Libraries end in the file extension .DLL, others may use .OCX, .CPL, or .DRV. There is a process called decompiling where the de-compiler allows the user to make use of the source code in the DLL file.
  • How To Resolve The Login Failure SQL Server error code – 18456
    • How To Resolve The Login Failure SQL Server error code – 18456
    • https://techbooky.com/resolve-the-login-failure-sql-server-error-code-18456/
    • Initially, sign in as an administrator to SQL Server and then go to the server where the user account in issue resides. Expand the logins, right-click on the account you want, and press New Login. Under the Login, go to New window, amp; press Search. Then enter the account username that you chose in the Logins tab, and then press Check Names.
  • Login failed for user 'XXXX' (Microsoft SQL Server, Error ...
  • How to Fix Microsoft SQL Server Error 18456? – TheITBros
    • How to Fix Microsoft SQL Server Error 18456? – TheITBros
    • https://theitbros.com/microsoft-sql-server-error-18456/
    • 2018-04-19 16:10:08.07 Logon Error: 18456, Severity: 14, State: 8. 2018-04-19 16:10:08.07 Logon Login failed for user 'sa'. Reason: Password did not match that for the login provided. [CLIENT: 10.27.65.29] As you can see, the user tried to login with a wrong password (State 8).
  • Job failing with error 28000 [18456] - login failed for ...
    • Job failing with error 28000 [18456] - login failed for ...
    • https://www.ibm.com/support/pages/job-failing-error-28000-18456-login-failed-user-domainnameusername
    • This driver allows to enable 'NT authentication'. When running a job in which the Modeler Admin user is used to connect to the database and the 'user' is used for connecting to the ODBC datasource the job fails with. ----- 28000[18456] [IBM SPSS][ODBC SQL Server Driver][SQL Server]Login failed for user 'domain_name\user_name'.
  • AAD Auth Error - Login failed for user '<token-identified ...
    • AAD Auth Error - Login failed for user '<token-identified ...
    • https://techcommunity.microsoft.com/t5/azure-database-support-blog/aad-auth-error-login-failed-for-user-lt-token-identified/ba-p/1417535
    • Login failed for user 'lt;token-identified principalgt;'. (Microsoft SQL Server, Error: 18456) Only fix i have to switch to Azure Data Studio - works some times OR switch to a VDI - works normally.
  • How to resolve - Microsoft SQL Server Error 18456 Login ...
    • How to resolve - Microsoft SQL Server Error 18456 Login ...
    • https://supertechman.com.au/how-to-resolve-microsoft-sql-server-error-18456-login-failed-for-user/
    • The generic message “Login Failed for User (Microsoft SQL Server, Error: 18456)” will often mean you entered invalid credentials when logging into SQL Server. If you are using the correct credentials, this blog will discuss possible solutions.
  • Event ID 18456 - Login Failed
    • Event ID 18456 - Login Failed
    • https://social.technet.microsoft.com/Forums/sharepoint/en-US/6e37ac88-bc0e-4a19-984d-8a06bf107066/event-id-18456-login-failed
    • This is an informational message only; no user action is required. 2009-07-08 08:36:00.69 Logon Error: 18456, Severity: 14, State: 16. 2009-07-08 08:36:00.69 Logon Login failed for user 'WHOOPER\SQL2005'.
  • How to Fix Login Failed for User (Microsoft SQL Server ...
  • Fix SQL Error 18456: failed to open the explicitly ...
    • Fix SQL Error 18456: failed to open the explicitly ...
    • https://techyaz.com/sql-server/failed-to-open-the-explicitly-specified-database/
    • Fix SQL Server error 18456 – Login failed for user; Let’s learn how to check default database settings for a SQL Server login and a user mapping for any database to the login. Check Login Properties. The solution to fix this issue can also come by reviewing the properties of this login.
  • Fix Microsoft SQL Server Error 18456 Login Failed for User ...
    • Fix Microsoft SQL Server Error 18456 Login Failed for User ...
    • https://www.pcvita.com/blog/fix-microsoft-sql-server-error-18456.html
    • 2. In the object, Explorer clicks on the security. And the user has to click on the properties. 3. Login Properties dialog box will open, choose the login and change the password. In case if the user failed to reset the SQL password then the user can take the help PCVITA MDF Password Recovery Software. Method 2: Now Check the SQL Server ...
  • SQL Server Error : 18456, Severity: 14. Login failed for ...
    • SQL Server Error : 18456, Severity: 14. Login failed for ...
    • https://sqlserver-dba.co.uk/sql-server/sql-server-error-18456-severity-14-login-failed-for-use.html
    • When a connection attempt is refused due to an authentication failure involving an incorrect password or user name, the client receives a message that looks like this: “User ‘user namegt;’ was unable to log in. (Error: 18456 in Microsoft SQL Server) “..
  • SQL SERVER - Login failed for user . Reason: Token-based ...
    • SQL SERVER - Login failed for user . Reason: Token-based ...
    • https://blog.sqlauthority.com/2015/08/19/sql-server-login-failed-for-user-reason-token-based-server-access-validation-failed-with-an-infrastructure-error/
    • SQL SERVER – Login failed for user . Reason: Token-based server access validation failed. ... Error: 18456, Severity: 14, State: 58. Login failed for user ‘sa’. Reason: An attempt to login using SQL authentication failed. Server is configured for Windows ...
  • Login Failed for user during Migrate() on Azure. Error ...
    • Login Failed for user during Migrate() on Azure. Error ...
    • https://github.com/dotnet/efcore/issues/15644
    • SqlException Login failed for user 'admin', number 18456 // If it not fails after CREATE DATABASE, everything works fine. var command = new SqlCommand (sql, connection) command. ExecuteNonQuery (); connection .
  • ERROR:(18456) [28000] [Microsoft][SQL Server Native Client ...
    • ERROR:(18456) [28000] [Microsoft][SQL Server Native Client ...
    • https://answers.sap.com/questions/8619619/error18456-28000-microsoftsql-server-native-client.html
    • 4 ETW000 [dev trc ,00000] (18456) [28000] [Microsoft] [SQL Server Native Client 10.0] [SQL Server]Login failed for user 'SMAPORTA\slmadm'. 4 ETW000 31 0.221735. 4 ETW000 [dev trc ,00000] ERROR: -1 in function SQLConnectWithRetry (SQLConnectWithRetry) [line 2285] 4 ...
  • ERROR [28000] [Microsoft][SQL Server Native Client 11.0 ...
    • ERROR [28000] [Microsoft][SQL Server Native Client 11.0 ...
    • https://social.msdn.microsoft.com/Forums/sqlserver/en-US/541c1e81-10b2-4ed5-8957-8a2e2a72baf4/error-28000-microsoftsql-server-native-client-110sql-serverlogin-failed-for-user
    • ERROR [28000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Login failed for user 'sa'.quot; Can someone tell me what is the problem or how to fix it? Sunday, July 9, 2017 10:25 PM
  • Login failed for [SQLSTATE 28000] (Error 18456) the step ...
    • Login failed for [SQLSTATE 28000] (Error 18456) the step ...
    • https://www.sqlserverblogforum.com/dba/login-failed-for-sqlstate-28000-error-18456-the-step-failed/
    • The step failed. Solution: Step 1: Check the source SQL server agent logon service account name. All programs –gt; SQL server 2008 –gt; Configuration Tools –gt; SQL server configuration manager. Go to the SQL server agent –gt; properties –gt; Check the logon tab and find the account name. Step 2: Check the same is available in the target SQL ...
  • SQLState:'28000', SQL Server Error: 18456 - SQL Server Q&A ...
    • SQLState:'28000', SQL Server Error: 18456 - SQL Server Q&A ...
    • https://ask.sqlservercentral.com/questions/51815/sqlstate28000-sql-server-error-18456.html
    • Everything works fine in my environment but when I send a link to a Microsoft Data Connection or send an Excel file with everything already set up to the user, I get the following error: Connection failed: SQLState: '28000' SQL Server Error: 18456 [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user 'myuser' I tried to follow ...
  • Login Failed – Error 18456, Severity 14, State 38 – Reason ...
    • Login Failed – Error 18456, Severity 14, State 38 – Reason ...
    • https://www.wikitechy.com/errors-and-fixes/sql/login-failed-error-18456-severity-14-state-38-reason-failed-to-open-the-explicitly-specified-database
    • 2017-09-11 04:53:19.880 Logon Error: 18456, Severity: 14, State: 38. 2017-09-11 04:53:19.880 Logon Login failed for user ‘GLOBAL\PORTAL01$’. Reason: Failed to open the explicitly specified database. SharePoint_Config’ [CLIENT: ] click below button to copy the code. By - sql tutorial - team Copy Code
  • sql server - why login failed for user sa on Amazon Aws ...
    • sql server - why login failed for user sa on Amazon Aws ...
    • https://stackoverflow.com/questions/69627198/why-login-failed-for-user-sa-on-amazon-aws-rds
    • The login user name sa. I can connect yesterday and the settings are the same today but today no connection. I tried reboot the db on amazon console but it does not happen.

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18456 login failed for user FAQ

What causes SQL Server login failed for user error?

SQL Server login failed for user error can occur due to any of the following reason: Invalid credentials when logging into SQL Server Enabling wrong authentication mode Password expired of the existing user account

Why is SQL Server Error 18456 failed for user SA?

SQL Server login failed for user error can occur due to any of the following reason: Invalid credentials when logging into SQL Server Enabling wrong authentication mode Password expired of the existing user account

What does " login failed for user " mean?

Getting “Login failed for user (Microsoft SQL Server, error 18456)” error is a nightmare for the DBA’s and developers while working on the SQL Server Database. The error code indicates a failed login attempt which may be occurred due to several reasons.