Inter-site replication and KCC, when migrating from 2008 SP1 to 2012 R2

Hello,
We have a very simple AD infrastructure, two sites. I have built out a 2012 R2 server, extended the AD schema and promoted it to a domain controller. Reviewing the existing AD replication topology, we currently have a 2008 SP1 server as a DC
designated as the source/destination for inter-site replication, which appears to have been decided by KCC.
I will be decomming this 2008 SP1 server, having migrated off the FSMO roles to a few other DCs.
Will KCC automatically know to adjust the replication topology when the 2008 SP1 DC is offline? Should I demote it after migrating off the FSMO roles?
Thanks,
Matt

Hi,
Thanks for your post.
By default, the KCC reviews and makes modifications to the Active Directory replication topology every 15 minutes to ensure propagation of data, either directly or transitively, by creating and deleting connection objects as needed. The KCC recognizes
changes that occur in the environment and ensures that domain controllers are not orphaned in the replication topology.
For more detail information, you could refer to:
http://technet.microsoft.com/en-us/library/cc961781.aspx
For the migration, you could transfer the Flexible Single Master Operations (FSMO) Role and remove the Windows 2008 R2 domain controller, please refer to:
Step-By-Step: Active Directory Migration from Windows Server 2008 R2 to Windows Server 2012 R2
http://blogs.technet.com/b/canitpro/archive/2014/05/28/step-by-step-active-directory-migration-from-windows-server-2008-r2-to-windows-server-2012.aspx
Regards.
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......................... DC2012R2 passed test Connectivity
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Auth Basc Forw Del Dyn RReg Ext
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Time Server Name: \\DC2008.hq.test.ch
Locator Flags: 0xe00013f8
Preferred Time Server Name: \\DC2008.hq.test.ch
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KDC Name: \\DC2008.hq.test.ch
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Preferred Time Server Name: \\DC2008.hq.test.ch
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KDC Name: \\DC2008.hq.test.ch
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......................... hq.test.ch failed test FsmoCheck
Starting test: Intersite
Skipping site Default-First-Site-Name, this site is outside the scope
provided by the command line arguments provided.
......................... hq.test.ch passed test Intersite
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Hi,
share out the Sysvol directory. However, it is recommended that you enable the system to share this directory.
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The system volume can take some time to initialize depending on the network.
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