Jordan Boich asks for more gruel:
Addressing orphaned users is an important piece of SQL Server security management. When left unchecked, you can accumulate an overwhelming number of users that exist in a database but do not have a correlating login in the master database, thus preventing access to the server or the database at all. There are dbatools PowerShell modules out there that can help you accomplish what sp_FindOrphanedUser does. However, there are some situations where PowerShell may not be available to you for a multitude of reasons, and having an extra tool in the toolbelt never hurt anyone, am I right?
Read on to learn about orphaned users and how the sp_FindOrphanedUser procedure works.