Avatar of Albert Widjaja
Albert Widjaja
Flag for Australia asked on

How to integrate the new AD domain controller + DNS with the current AD domain controller with no downtime ?

Hi all,

I'm about to commission 2x new Windows Server 2012 R2 and promote it as AD integrated DNS with Domain Controller (GC) role to replace the existing 2008 R2 DC/GC & DNS role.

What are the steps to implement it without outage or downtime to the existing environment ?

How can I decommission the old 2008 R2 Domain controller without impacting the Exchange email and DNS resolution ?

Thanks.
Windows Server 2012DNSActive DirectoryExchangeMicrosoft Server OS

Avatar of undefined
Last Comment
Albert Widjaja

8/22/2022 - Mon
Luis Mena

Are the new DC going to have the same name/IP?
SOLUTION
s_sykes

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
ASKER CERTIFIED SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
Albert Widjaja

ASKER
Hi Luis,

No, I plan to have different name and IP address since keeping the same name is going to be harder to cutover.
Albert Widjaja

ASKER
Dave and Sykes,

Thanks for the reply. No, it is just running as Domain Controller / Global Catalog + DNS and DHCP only for the remote office (different AD site but same AD domain).

The old 2008 R2 server does not have any FSMO role since the FSMO roles are held by the main DC/GC in the Data Center.

I guess it is just simple Next-Next-Finish deployment :-)
All of life is about relationships, and EE has made a viirtual community a real community. It lifts everyone's boat
William Peck
Albert Widjaja

ASKER
I've also checked in the AD domain, any server with static DNS is not using the DNS in these two servers that I'm about to decommission.
DHCP scope can be changed the day before the demotion I guess.
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
Albert Widjaja

ASKER
Cliff,

OK, so in this case how do I plan this properly ?

Can I reduce the DHCP IP lease to just 1 hour few days before the decommission process ?

so that on the decommission day, I can just wait one hour for the new IP to be assigned by the DHCP server ?
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
Albert Widjaja

ASKER
OK so the high-level steps will be:

1. Install & Configure the 2x new 2012 R2 VMs newDC1 & newDC2 as AD/DC&GC
2. Configure as DNS+DHCP server role
3. In the existing DHCP server oldDC1, add the new DNS server as newDC1 & newDC2
4. Reduce the IP lease from 8 days into 1 hour to make it in effect
5. After all workstation clients get the new lease, decommission / demote oldDC1 and oldDC2

Can anyone clarify if that is correct ?
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
Albert Widjaja

ASKER
Cliff,

I'm decommissioning the old 2008 R2 servers and introducing the new 2012 R2.

Hopefully the steps above I mentioned is correct apart from the DHCP scope lease modification that I'm modifying and importing with another steps (Powershell script).
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
Albert Widjaja

ASKER
Thanks All !