Hello everyone! I'm lost here. I've been trying to figure out why some of my Accounts have almost all the fields enabled and some don't when editing them. They're all created the same year(2015), same type, same subsidiary but some I can change all the parameters and others nothing at all? This is happening in PROD and in SandBox. Here are some examples. I highlighted in red the fields I cannot edit.

System account

what can tell me if it is indeed a system account?

Create a saved search (Account search) & add "Special Account Type" to the results. I think ones with that set are system-used accounts

Yep, that's it. You got it ! Thank you very much!!

@PNJ That is crazy! Never knew about that. Nice find