Solaris 11.4 SRU 72: Core OS user integrity check
When you access a freshly installed Solaris system (directly from the ISO without any automated post-install stuff) 1 and investigate the `passwd file, you will already see a lot of preexisting users before you have done anything on your own. Those are used my many functions in the operating system. And they must be exactly setup in this way, so the operating system can work without problems. When you change a property of such a user, you may break things. And it’s not that seldom, that an issue with a system can finally be root caused to such a change.