Changing domain controller in an Exchange 2010 environment

Hello!

I have multiple Exchange 2010 servers (CAS, Mailboxes and EDGEs).

I'm going to deploy new (Windows 2012) DC and downgrade the old one.

What and where should I check to make sure that old DC is not hard-coded somewhere in the configuration settings?

That is what I'm thinking about:

Get-ADServerSettings

Set-ADServerSettings -PrefferedServer

Is that it?

I understand that AD Discovery service should do it's job, but I want to be sure that I've checked everything.

Thank you in advance!