I'm a fool.

Trying to delete local version of domain account:
Supposed to use command:
net user [username] /delete

Tried:
net user "domain\user" /delete

Didn't work, came up with help which said an option was net user [/delete] [/domain]
So I decided to try:
net user "user" /delete /domain

... "The request will be processed at a domain controller for domain domain.local.

The command completed successfully."

Well FUCK

So now the user's account has been deleted on AD, trying to restore it but AD management tools aren't picking up AD's object so I can't find the tombstone.

SHIITTTTTTTTT :((

TL;DR: I've fucked a user's account and can't find what I need to fix it.

Moral: Don't be a fool like me.