Hello,
I'm about to the demote from my infrastructure the last domain controller still running 2008 R2.
On this last DC there's an uncontrollable list of applications and services that are configured to use his IP address (mainly IP) for LDAP QUERIES.
Since things grew without control, despite major applications were already migrated, we cannot guarantee that everything (ldap and dns queries) ares migrated from this DC to the new ones..
After demoting I'm considering creating a reverse PTR record point his IP address to the name of one of the new DCs (2012 r2). And also create a CNAME record point his name to a name of one of the new DCs.
Is there any problem on creating this new records? the old machine will be demoted, renamed and turned off
ty