Upgrading Windows 2003 DC to Windows 2012 DC

If Domain Controllers are migrated from Windows 2003 to a new installation of Windows Server 2012 does that mean they have to use the Active Directory in Windows 2012. is there a migration process that needs to be done to migrate AD 2003 to AS 2012? or can the AD 2003 be used in Windows Server 2012?
HyperTech1911Asked:
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becraigCommented:
Here is a step by step migration guide:
http://blogs.technet.com/b/canitpro/archive/2014/04/02/step-by-step-active-directory-migration-from-windows-server-2003-to-windows-server-2012.aspx

My suggestion is to simply ensure the forest and domain functional levels then add the 2012 server and migrate the roles.

Some things like exchange might be a little trickier but that would be something you handled differently as there are also defined ways to do this.
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HyperTech1911Author Commented:
Let me rephrase the question: Prior to me another Engineer did a migration from Windows server 2003 to Windows  Servers 2012.  the Business believes they are still running AD 2003.   Is possible to still have 2003 Active Directory running on the Window Servers 2012?  even after decommissioning the Windows Servers 2003.  If yes, is the a update\migration that has to be done to reflect a 2012 Active Directory?
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becraigCommented:
I assume you mean the forest / domain functional level.

You can verify and change that if need be:
http://support.microsoft.com/kb/322692


PLEASE NOTE DO NOT CHANGE THE FUNCTIONAL LEVEL UNLESS YOU ARE SURE THERE ARE NO EARLIER DOMAIN CONTROLLERS PRESENT.
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HyperTech1911Author Commented:
Please read below and let me know if I am correct.  I read below as:

Domain Controller Functionality is Windows 2012R2
Domain Functionality is Windows 2003
Forest Functionality is Windows 2003

I would have to raise the "Functional Levels on the Domain first them raise the Functional Levels on the Forest"


ld = ldap_open("", 389);
Established connection to .
Retrieving base DSA information...
Getting 1 entries:
Dn: (RootDSE)
configurationNamingContext: CN=Configuration,DC=BLANK,DC=local;
currentTime: 8/27/2014 12:27:56 PM Eastern Daylight Time;
defaultNamingContext: DC=BLANK=local;
dnsHostName: BLANK.local;
domainControllerFunctionality: 6 = ( WIN2012R2 );
domainFunctionality: 2 = ( WIN2003 );
dsServiceName: CN=NTDS Settings,CN=BLANK,CN=Servers,CN=BLANK-DC,CN=Sites,CN=Configuration,DC=BLANK,DC=local;
forestFunctionality: 2 = ( WIN2003 );
highestCommittedUSN: 2523941;
isGlobalCatalogReady: TRUE;
isSynchronized: TRUE;
ldapServiceName: BLANK.local:BLANK$@BLANK.LOCAL;
namingContexts (5): DC=BLANK=local; CN=Configuration,DC=BLANK,DC=local; CN=Schema,CN=Configuration,DC=BLANK=local; DC=DomainDnsZones,DC=BLANK,DC=local; DC=ForestDnsZones,DC=BLANK,DC=local;
rootDomainNamingContext: DC=BLANK,DC=local;
schemaNamingContext: CN=Schema,CN=Configuration,DC=BLANK=local;
serverName: CN=NYADS001E0,CN=Servers,CN=BLANK-DC,CN=Sites,CN=Configuration,DC=BLANK,DC=local;
subschemaSubentry: CN=Aggregate,CN=Schema,CN=Configuration,DC=BLANK,DC=local;
supportedCapabilities (6): 1.2.840.113556.1.4.800 = ( ACTIVE_DIRECTORY ); 1.2.840.113556.1.4.1670 = ( ACTIVE_DIRECTORY_V51 ); 1.2.840.113556.1.4.1791 = ( ACTIVE_DIRECTORY_LDAP_INTEG ); 1.2.840.113556.1.4.1935 = ( ACTIVE_DIRECTORY_V61 ); 1.2.840.113556.1.4.2080 = ( ACTIVE_DIRECTORY_V61_R2 ); 1.2.840.113556.1.4.2237 = ( ACTIVE_DIRECTORY_W8 );
supportedControl (37): 1.2.840.113556.1.4.319 = ( PAGED_RESULT ); 1.2.840.113556.1.4.801 = ( SD_FLAGS ); 1.2.840.113556.1.4.473 = ( SORT ); 1.2.840.113556.1.4.528 = ( NOTIFICATION ); 1.2.840.113556.1.4.417 = ( SHOW_DELETED ); 1.2.840.113556.1.4.619 = ( LAZY_COMMIT ); 1.2.840.113556.1.4.841 = ( DIRSYNC ); 1.2.840.113556.1.4.529 = ( EXTENDED_DN ); 1.2.840.113556.1.4.805 = ( TREE_DELETE ); 1.2.840.113556.1.4.521 = ( CROSSDOM_MOVE_TARGET ); 1.2.840.113556.1.4.970 = ( GET_STATS ); 1.2.840.113556.1.4.1338 = ( VERIFY_NAME ); 1.2.840.113556.1.4.474 = ( RESP_SORT ); 1.2.840.113556.1.4.1339 = ( DOMAIN_SCOPE ); 1.2.840.113556.1.4.1340 = ( SEARCH_OPTIONS ); 1.2.840.113556.1.4.1413 = ( PERMISSIVE_MODIFY ); 2.16.840.1.113730.3.4.9 = ( VLVREQUEST ); 2.16.840.1.113730.3.4.10 = ( VLVRESPONSE ); 1.2.840.113556.1.4.1504 = ( ASQ ); 1.2.840.113556.1.4.1852 = ( QUOTA_CONTROL ); 1.2.840.113556.1.4.802 = ( RANGE_OPTION ); 1.2.840.113556.1.4.1907 = ( SHUTDOWN_NOTIFY ); 1.2.840.113556.1.4.1948 = ( RANGE_RETRIEVAL_NOERR ); 1.2.840.113556.1.4.1974 = ( FORCE_UPDATE ); 1.2.840.113556.1.4.1341 = ( RODC_DCPROMO ); 1.2.840.113556.1.4.2026 = ( DN_INPUT ); 1.2.840.113556.1.4.2064 = ( SHOW_RECYCLED ); 1.2.840.113556.1.4.2065 = ( SHOW_DEACTIVATED_LINK ); 1.2.840.113556.1.4.2066 = ( POLICY_HINTS_DEPRECATED ); 1.2.840.113556.1.4.2090 = ( DIRSYNC_EX ); 1.2.840.113556.1.4.2205 = ( UPDATE_STATS ); 1.2.840.113556.1.4.2204 = ( TREE_DELETE_EX ); 1.2.840.113556.1.4.2206 = ( SEARCH_HINTS ); 1.2.840.113556.1.4.2211 = ( EXPECTED_ENTRY_COUNT ); 1.2.840.113556.1.4.2239 = ( POLICY_HINTS ); 1.2.840.113556.1.4.2255; 1.2.840.113556.1.4.2256;
supportedLDAPPolicies (19): MaxPoolThreads; MaxPercentDirSyncRequests; MaxDatagramRecv; MaxReceiveBuffer; InitRecvTimeout; MaxConnections; MaxConnIdleTime; MaxPageSize; MaxBatchReturnMessages; MaxQueryDuration; MaxTempTableSize; MaxResultSetSize; MinResultSets; MaxResultSetsPerConn; MaxNotificationPerConn; MaxValRange; MaxValRangeTransitive; ThreadMemoryLimit; SystemMemoryLimitPercent;
supportedLDAPVersion (2): 3; 2;
supportedSASLMechanisms (4): GSSAPI; GSS-SPNEGO; EXTERNAL; DIGEST-MD5;
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becraigCommented:
Yup so both Domain and forest are at 2003.

Unless you are sure no DC's lower than 2003 will be in the AD then you can raise, otherwise you are safe to leave or raise at least to 2008 (in the event you ever have any 2008 DCs)
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HyperTech1911Author Commented:
Great! thank you very much!
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