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Michael W

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Raising "Domain Functional" level from 2003 to 2008 as well as "Forest Functional" level from 2003 to 2008

Hi,
A client of ours is still sitting at "Windows Server 2003" for both the "domain and forest" functional levels. They only have 1 x 2008 member server with the rest of the member servers being Server 2012 and Server 2012 R2 editions.

We are having SYSVOL replication issues (I believe that it is still trying to use FRS versus using DFS Replication as it should be. We are also having DNS issues that we believe may be related to this as well.

I want to raise both the domain and forest functional levels, is there a specific order that these need to be done in? Is there a reboot of any kind required? Services that need to be restarted?

I haven't done this in several years so any suggestions are greatly appreciated.

Mike
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Michael W

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It should be noted that both DC's are running Server 2012

Mike
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No, you can raise them in either order.  

No, no reboot will be required.

No services will need to be restarted.

I've done this dozens of times.  One of the easiest admin things to do.  Never had it go sideways.
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Lee W, MVP
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Please recommend at least 2008 R2 to your client and enable recycle bin after forest upgrade
Do we need to migrate FRS to DFS replication before upgrading the domain and forest functional levels?

Mike
Thanks, it went well and was quick and easy.

Next steps: migrating to DFS replication from FRS