Microsoft SQL Server database ranks third in the relational database, second only to Oracle and MySQL database. when using it, it is inevitable to encounter various problems and warnnings. You may be dba or a developer, I hope this content can help you solve SQL Server error number 18494.

Error number: 18494

Severity level: 16

Event logged: The user instance login flag is not allowed when connecting to a user instance of SQL Server. The connection will be closed.%.*ls