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 15517.

Error number: 15517

Severity level: 16

Event logged: Cannot execute as the database principal because the principal “%.*ls” does not exist, this type of principal cannot be impersonated, or you do not have permission.