Biting your tongue while eating is the perfect example of how you can mess up even with decades of experience.

Should have setup a staging enviroment and tasted there first before diving in. \s

20 years ago? Shit, that was nothing compared to modern day amazon.

Yeah I threw like 1 week of email into a black hole unknowingly.

Instead of multiple shared mailboxes for different emails they used a master shared mailbox with a bunch of DLs all pointed to it.

The DLs were just single email contact to the one master mailbox.

Well I reinstalled Azure AD Connect (no backuo config) and didn't check off the damn contacts OU.

ALL THE EMAIL WENT TO A BLACK HOLE

After fixing the issue the email was still gone. Thankfully they had an antispam proxy service that kept a copy of all email. I restored all the aliases by resending. Managed to recover sales@company.com emails and the like.

It was the most idiotic design I've ever seen. No RBAC. Everyone just had access to "the mailbox" and they had mail filters to put it in folders. They had 3k employees too. Not a mom and pop shop at all.

I feel like some C-suite complained about "too many mailboxes" and the sysadmin "fixed it".

That person should be shot. Just because you can doesn't mean you should.

Yeah I mean, that guy learned a valuable lesson that day. Bet he never did that again.

I once deleted a whole web server that was serving like a dozen e-commerce clients. I blame digital ocean. Both cloning and deleting had you write the servers name to confirm. Come on. Jfc. The options were adjacent.

Anyways, yep. I double check every clone/delete operation that might possibly disrupt prod ever since.