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 ...
1. Change registry key SqlCluster in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.x\Setup\ from 1 to 0 2. Disable TCP/IP in Server Network Protocols and enabled Named Pipes from ...
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When you encounter the “Network-related or instance-specific error” in SQL Server, it usually happens when trying to connect to a database, and the connection ...