?
Solved

DCPROMO issues from server 2008 R2 , transferring to server 2012 R2

Posted on 2016-08-13
9
Medium Priority
?
83 Views
Last Modified: 2016-09-20
i am trying to dcpromo a DC from 2008 R2 and i keep getting an error stating the operation failed because it cant connect to another DC (2012 R2 machine). i have transferred roles succesfully, ran FSMO successfully, but old DC will not demote. i turn old DC off and active directory in new DC (2012 R2 ) machine stops functioning and all my users disappear. only when i turn on old DC does active directory begin to function correctly. any advice on what to do? DNS and DHCP is working correctly on new DC.
0
Comment
Question by:bhamilton3180
  • 3
  • 3
  • 2
  • +1
9 Comments
 
LVL 28

Expert Comment

by:MAS EE MVE
ID: 41755207
First thing shutdown your old DC for couple of days and check for issues as there is a chance for service outage.
If everything works fine start again remove without replicating.
dcpromo /forceremoval
0
 

Author Comment

by:bhamilton3180
ID: 41755209
i dont have a couple of days. server must be ready to roll out by this monday. i have a 100 users waiting.
0
 
LVL 97

Accepted Solution

by:
Lee W, MVP earned 1000 total points (awarded by participants)
ID: 41755226
You should start - BEFORE even adding the DC - with running DCDIAG /C /E /V and correcting any unexplained issues.  I suspect you didn't, but that's where you should be starting.  Verifying the DNS on the DCs, running DCDIAG /C /E /V, and Running REPADMIN /SHOWREPL
1
Evaluating UTMs? Here's what you need to know!

Evaluating a UTM appliance and vendor can prove to be an overwhelming exercise.  How can you make sure that you're getting the security that your organization needs without breaking the bank? Check out our UTM Buyer's Guide for more information on what you should be looking for!

 
LVL 97

Assisted Solution

by:Lee W, MVP
Lee W, MVP earned 1000 total points (awarded by participants)
ID: 41755227
You definitely have a couple of days - or you don't understand AD.  If you don't understand AD, you should push things back, learn it, and then do this... Otherwise, hire a pro who does understand AD and can get things working properly.
1
 
LVL 17

Assisted Solution

by:Sajid Shaik M
Sajid Shaik M earned 1000 total points (awarded by participants)
ID: 41755230
check the DCDIAG tool
https://www.microsoft.com/en-sa/download/details.aspx?id=31063

DCDIAG

DCDIAG analyzes the state of domain controllers in a forest or enterprise and reports any problems to help in troubleshooting.

Preparing to install or migrate to Exchange new version
Checking FSMO roles.
Troubleshooting Group Policy.
Investigating Active Directory not replicating frssysvol error.
Running down Kerberos authentication problems.
Resetting the Directory Service Administrator’s password.
Fixing servers Service Principle Name (SPN) error.
Other DC issues
Example: dcdiag.exe /V /D /C /E > c:\dcdiag.log

all the best
0
 

Author Comment

by:bhamilton3180
ID: 41755238
Thanks Shaik. This is what I did

http://thetechnosolution.com/migrate-server-2008-r2-to-server-2012-r2/

DNS and DHCP is working on the new DC. I ran into this issue like over a year and a half ago and forgot how I solved it. FSMO roles transferred over just fine. I get correct response when I query them.

DC promo failed from old server.
0
 
LVL 97

Expert Comment

by:Lee W, MVP
ID: 41755592
If you want this resolved you should answer my questions.  What did you find when running DCDIAG /C /E /V on the DC that won't Demote?  Did you run REPADMIN /SHOWREPL?  You should also post screenshots of error messages.  You need this done ASAP? Then you need to work with us all!
0
 
LVL 28

Expert Comment

by:MAS EE MVE
ID: 41781025
@bhamilton3180
Appreciate if you respond to experts comments.
0
 
LVL 28

Expert Comment

by:MAS EE MVE
ID: 41806163
I believe this can be closed as there is enough information to resolve this issue
0

Featured Post

[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A safe way to clean winsxs folder from your windows server 2008 R2 editions
This article explains how to install and use the NTBackup utility that comes with Windows Server.
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles to another domain controller. Log onto the new domain controller with a user account t…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

599 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question