Retiring Domain Controller(s) - locating hard-coded IPs in Dashboard

[RobShort]

I am retiring some old (out-of-date) domain controllers and need to remove any hard-coded instances of their IP addresses from the Dashboard.

I've gotten the usual spots - DNS entries in DHCP, WiFi/APs, switches, VPN, etc. Anyone know of other locations in the Dashboard I should check before I retire the old DCs? (I'm already planning the old "Temporarily shut down the DCs and see what breaks" method, but wanted to catch as many hard-coded entries as I could before I try that.)

Appreciate any and all throughs/suggestions. 

[DarrenOC]

Off the cuff, what about the DNS entries under your device LAN management settings for switches, APs etc? Are they pointing at your DC’s for DNS?

[DarrenOC]

Any Radius related config? Some sites run Radius in the same server as their DC.  Any Umbrella setup/integration?