Removing Primary DC and transfering roles to secondary DC

We have 2 DC (DC1 and DC2) in our domain. Both are running win 2008 R2. As primary (DC1) was playing up every now and then, we transfered all 5 FSMO roles to DC2. So questions are as below
1) DC1 still hold DHCP which we need to transfer to DC2 (Any step by step reference to do that?)
2) After DHCP is transfered we will remove primary DNS on DC1 (as DC2 is acting as secondary DNS). Is that right?
3) After the FSMO roles were transfered, logon servers for workstation still comes as DC1. Is that normal?
4) what are the steps we need to do to remove DC1 from infrastructure (demote). Or do we need to do anything else before this step?
ArcITIT ManagerAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
Is DC1 acting up? If so what is it doing? Even when you transfer the FSMO roles to DC2 users will still use DC1 for authentication as well.

If you are having issues with DC1 you can just demote it. You can transfer the DHCP role after you demote DC1. If DC1 is stable you could also keep the DHCP role on there as well.

If you choose to demote this server you will need to update the DHCP DNS options for your scopes and also chang the static addresses on your servers as well.

You will also need to remove the DNS role manually as it does not do it automatically when you demote the server.

I would also recommend added another DC into your domain so that you have redundancy for your DC's.

Will.
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Seth SimmonsSr. Systems AdministratorCommented:
DC1 still hold DHCP which we need to transfer to DC2

you can use powershell to do the migration

DHCP Server Migration Guide
https://technet.microsoft.com/en-us/library/dd379535%28v=ws.10%29.aspx

After DHCP is transfered we will remove primary DNS on DC1

yes.  change any statically-configured hosts to use DC2 and update dhcp scope(s) to use DC2 for DNS

After the FSMO roles were transfered, logon servers for workstation still comes as DC1. Is that normal?

yes.  as long as it is still a domain controller it can process user logons

what are the steps we need to do to remove DC1 from infrastructure (demote).

you use dcpromo as you did when you made it a domain controller

Removing a Domain Controller from a Domain
https://technet.microsoft.com/en-us/library/cc771844(v=ws.10).aspx

also, make sure DC2 is configured as a time server for the domain

How to configure an authoritative time server in Windows Server
https://support.microsoft.com/en-us/kb/816042
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