As time passes, the business value derived from a company's IT infrastructure continues to expand. Usually, along with this, the 'interconnectedness' of the infrastructure expands, too.
One of the goals of an IT Pro is similar to a paraphrase of Hippocrates: "First, do no harm."
When we DCPROMO a Domain Controller (DC) out of Active Directory (AD), it is a very easy wizard-driven process. However, without proper forethought and a few precautions, that easy process can possibly have a far reaching and substantial negative impact on production IT Operations. I like to help my customers avoid those situations with good proactive advice and meaningful lessons-learned.
Personally, I love checklists – they are always more complete than my memory, they can be templatized and re-used. Checklists can serve as a paper trail for Change Control audits or histories and they can often help you cover your butt if things go south.
Here are few items for a DC decommission checklist.
Prior to DCPROMO
Before we yell BANZAI! and kick off a DCPROMO, what should we check?
For me, there is always a period of time where I'm still 'waiting' for the phone to ring or pager to go off but once you get past that time, usually a few hours during the business day, have a Coke and smile J