Hello All,

I have the fun situation of having Exchange, DC, AD, DNS, and DHCP all on one server. I inherited this and no that it is not recommended or supported. I looked at migrating exchange but found that was the bad way to go. I now want to migrate DC, DNS, and DHCP from the current exchange server to a new 2008R2 server and dont want to miss anything. I have run through the migration prep checklist and have everything noted. Now is the point I am worried. I know that I installed the AD DS and then I can run the DCPromo to start the process. From what I can tell DNS will come with it but do I need to install that Role before I start the DC Promo? Once I do the DC Promo do I then install the DHCP roles or is that later on? Also once I bring this new server up I know that it is running as secondary until I migrate everything and demote the exchange server.

I am looking for stuff that I know I will miss by having to give this server a new name and IP. I know that DHCP will take care of the new DHCP server and I will just have to change the static devices to see the new IP. I guess my concerns are what affects I need to take care of on the old server that is demoted but is still running Exchange 2010 and what else I have missed on the new server that is caused by the new name and IP.

Sorry for the amount of questions but this seems to be the only way I can start getting things seperated and correct before I face moving to future OS upgrades.

Thanks again,

Hi

 You can follow the steps on article for add additional domain controller on 2008 r2 domain

http://www.vkernel.ro/blog/creating-an-additional-domain-controller-in-an-existing-domain

You don't need to install DNS role before migration proccess(just set prepered DNS to DC ip adrress),it will ask while contiuining on migration.Also after you succesfully add the ADC to domain you can migrate DHCP role to ADC.

Check this for dhcp migration

http://blogs.technet.com/b/networking/archive/2008/06/27/steps-to-move-a-dhcp-database-from-a-windows-server-2003-or-2008-to-another-windows-server-2008-machine.aspx

And if you prefer to migrate Exchange another server,you will do exchange cross forest move request for migrate your Exchange environment

http://technet.microsoft.com/en-us/library/ee633491(v=exchg.150).aspx

From what I can tell DNS will come with it but do I need to install that Role before I start the DC Promo? Once I do the DC Promo do I then install the DHCP roles or is that later on?

You can promote your DC and chosoe that it will be a DNS server. Once done, wait for the AD replication to be done (If your DNS zones are AD-integrated then they will be replicated). Use dcdiag and repadmin commands to have the visibility on your DCs health and your AD replication status. Once done, you can install your DHCP and do your DHCP migration. Make sure that the DHCP is no longer running on the old server once the migration is done to avoid having duplicate IPs.

As for the Exchange part, I would recommend to ask them in Exchange forums to have a better visibility about how you need to process BEFORE demoting the old DC: https://social.technet.microsoft.com/Forums/office/en-US/home?category=exchangeserver