The directory services is missing mandatory configuration information, and is unable to determine the ownership of floating single-master operation roles.

Looks like you missed step 3 here.

http://greigmitchell.co.uk/guide-migrating-server-2008-r2-domain-controllers-to-server-2012/

Try this
http://social.technet.microsoft.com/Forums/en-US/winserverDS/thread/847644e7-aee5-4d20-8bf8-497c359268fc

http://social.technet.microsoft.com/Forums/en/winserverDS/thread/2b5269f3-8b45-4e2b-aa10-c78493bbb547

Try Transferring the FSMO roles to the newly Installed Windows 2012 Domain Controller.

I am assuming you are upgrading the OS from 2008 to 2012 by adding a new DC (Not Migration) and the forest name is not changed

So in this case this seems to be issue with connectivity ...
First post the dcdiag /q from 2012
repadmin /replsum from 2012

Then we would be able to conclude anything ...In worst case you will need to seize FSMO roles on 2012 server using below link

Seize FSMO role:
http://www.petri.co.il/seizing_fsmo_roles.htm

I have successfully  transferred FSMO roles to migrated 2012 DC. after transfer FSMO I have run command netdom query fsmo and it shows successfully.here i have attached file
fsmo.jpg

My setup is as below
old server : win server 2008 r2 including Active Directory and DNS

plan for New server: win server 2012 with Active directory and DNS and used new hardware with upgraded one.

I have followed below url for the migration
http://www.msserverpro.com/migrating-active-directory-domain-controller-from-windows-server-2008-r2-to-windows-server-2012/

all steps done successfully but can not remove old dc with dc promo.

here I have attached test result of command dcdiag /q from 2012
repadmin /replsum from 2012

please give me solution asap as i stuck between....
dcdiag-and-repadmin-test-from-ne.jpg

Here I have attached right screenshot of my test setup which shows all fsmo roles are transferred successfully. Though I have tried with seize FSMO but when i run this it shows transferred successfully no need to seize.
fsmo-result.jpg

Further more I have checked dcdiag /q from 2012
repadmin /replsum from 2012  while put down old 2008 R2 DC. Than i will get test result as attached
dcdiag-test.jpg

Can you make an entry in DNS of the missing GUID (see attacment). Without porper GUID, AD will never replicate.

Regards,
Thomas
DNS---GUID.png

It seems to be dns issue make sure below practice is followed



Every DNS server should Point to its own IP as a primary DNS and DNS located in remote site as a secondary DNS in TCP/IP properties
All the unused NIC's to be disabled
Valid DNS Ip from ISP to be configuered in DNS forwarders Do not configuere local DNS in forwarders
Public DNS IP's Should not be used at any NIC Card except Forwarders
Domain Controllers should not be multi-homed
Running VPN server and RRas server makes the DC multihomed refer http://support.microsoft.com/default.aspx?scid=kb;en-us;272294


If anything above is incorrect please correct it and run "ipconfig /flushdns & ipconfig /registerdns " and restart DNS service using "net stop dns & net start dns"

DNS best practices
http://technet.microsoft.com/en-us/library/cc778439(v=WS.10).aspx

Checklist: Deploying DNS for Active Directory
http://technet.microsoft.com/en-us/library/cc757116(v=ws.10)

DNS Arguments

http://blogs.technet.com/b/askds/archive/2010/07/17/friday-mail-sack-saturday-edition.aspx#dnsbest

The dcdiag output you posted in #38742912 shows an event in the System log indicating that your servers' clocks are not synchronized.  Is that only happening in your test environment?  If it's happening in production, it needs to be addressed, as too much clock skew (>5 minutes by default) causes Kerberos authentication failures.

Thanks for your  quick reply. But now i got error in Group policy. DNS name resolution and all working fine now. But group policy is not implemented as I configure in 2008 r2 AD. the policy folders and all are migrated but not in effect. here I have attached screenshot.

when i reset any password fron this 2012 new AD it will give effect on client end. but i can not get my old configured Group policy.
gp.jpg
group-policy-error.jpg

Run the "net share" command on both DCs to verify that the SYSVOL and NETLOGON folders are shared.

I have run "net share" command on both DCs to verify but  in 2008 R2 I can find NETLOGON folder which shows shared. but in windows server 2012 AD server i could not find NETLOGON folder shared. event i can not find. can you give me detail path? or what configuration should be done?