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How to Fix Login Failed for User (Microsoft SQL Server, Error: 18456) Step-By-Step – Add SQL Administrator to SQL Management Studio – ITProGuru Blog
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SQL SERVER - Fix : Error: 4064 - Cannot open user default database. Login failed. Login failed for user - SQL Authority with Pinal Dave
Error: Unable to establish database connection. [Microsoft][ODBC SQL Server Driver][DBNETLIB]SQL Server does not exist or access denied. Native error: 17 [Microsoft][ODBC SQL Server Driver][DBNETLIB]ConnectionOpen (Connect()). (includes video)
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Sqlcmd: Error: Microsoft ODBC Driver 17 for SQL Server : Login timeout expired. · Issue #923 · microsoft/msphpsql · GitHub
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