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 15365.

Error number: 15365

Severity level: 16

Event logged: Failed to generate a user instance of SQL Server. Only members of Builtin\Users can generate a user instance. The connection will be closed.%.*ls