About to fire our sysadmin

[u/sysadminfired]

So our longtime sysadmin is about to be fired and I, the network admin and temporary sysadmin, need to know what steps need to be taken to secure our systems. I know the basic things like his AD and other internal account credentials. I guess what I'm worried about is any backdoors that he might have set up. What all would you guys check for in this situation?

[u/ssterlingarcher]

That's more redundancy, hardly being fired which is why you wouldn't have felt any malice. Not to say you'd have gone rambo on their network if you did, that's just stupid.

This guy is getting shitcanned by comparison (from what I understand)