![How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog](https://itproguru.com/wp-content/uploads/2014/09/image_thumb11.png)
How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog
![How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog](https://itproguru.com/wp-content/uploads/2014/09/image_thumb10.png)
How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog
![Azure Pipelines connecting to Azure SQL Database AAD - Login failed for user '<token-identified principal> - Stack Overflow Azure Pipelines connecting to Azure SQL Database AAD - Login failed for user '<token-identified principal> - Stack Overflow](https://i.stack.imgur.com/RGaVx.png)
Azure Pipelines connecting to Azure SQL Database AAD - Login failed for user '<token-identified principal> - Stack Overflow
![How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog](https://itproguru.com/wp-content/uploads/2014/09/SNAGHTML1d3c8af8.png)
How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog
![authentication - Azure SQL Database "Login failed for user" in application, but works fine in SSMS - Database Administrators Stack Exchange authentication - Azure SQL Database "Login failed for user" in application, but works fine in SSMS - Database Administrators Stack Exchange](https://i.stack.imgur.com/n97is.png)
authentication - Azure SQL Database "Login failed for user" in application, but works fine in SSMS - Database Administrators Stack Exchange
![Azure / SQL Server / Azure SQL Database Disaster Recovery / Orphaned Users / Different SIDs | SQL Server Blog Azure / SQL Server / Azure SQL Database Disaster Recovery / Orphaned Users / Different SIDs | SQL Server Blog](https://blog.sqlserveronline.com/wp-content/uploads/2018/11/sid_error.png)
Azure / SQL Server / Azure SQL Database Disaster Recovery / Orphaned Users / Different SIDs | SQL Server Blog
![SQL SERVER - FIX : ERROR : Cannot open database requested by the login. The login failed. Login failed SQL SERVER - FIX : ERROR : Cannot open database requested by the login. The login failed. Login failed](https://blog.sqlauthority.com/i/b/errnt1.jpg)