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I have 2 Domain controllers connect together with external 1 way connection and they both use windows server 2003. I need to demode of of them but i have been instructed to change the functionality

Posted on 2014-07-23
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I have 2 Domain controllers connect together with external 1 way connection and they both use windows server 2003. Both domains are on a different forest. I need to demode one of them but i have been instructed to change the functionality on one of them to windows server 2008. Is that possible, will it cause any problems ? How am i going to do that ?
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Question by:AndreasChristoforides
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by:Patrick Bogers
ID: 40214243
Hi

Change the functional level to server 2008 or upgrade the OS from 2003 to 2008? If the latter, it is quit simple, watch this step by step.

Personally i would demote the second DC in advance and make a full backup of the remaining before proceeding the upgrade.
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by:AndreasChristoforides
ID: 40216048
Hello Patrick,

Thank you so much for your video, i already bookmark it. But i want to change the functional level to server 2008, i do not want to upgrade to 2008 ! Been told that i have to pay a lot of attention there to the DNS, but i did not do anything yet to be honest. Any advise?

Thanks
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Patrick Bogers earned 2000 total points
ID: 40216089
Hi again,

Ok, so if you have 2 2003 DC's i see no harm in upgrading the functional level to 2008. ( i do not advise to go to 2008 r2 in one step )
This is done is Active Directory Domains and Trusts-> Right click AD Domains and trust and select 'Raise functional level'
Always make sure you take a bare metal backup in case you need to go back.

Just to be curious, what functionallity do you need what justifies this functional level upgrade?
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Author Comment

by:AndreasChristoforides
ID: 40228994
Hello Patrick,
Thank you so much my friend. Yes indeed there is no harm for the functional level to 2008. I have raise the functional level successfully !:) Yes backup is always in my mind for everything i do.
Well i don't know what justifies this functional level upgrade to be honest but i am pretty sure some software application the software engineers wanted to install and they wanted that functional level to be 2008. They ask, i have to deliver ! Again Patrick , thank you so much my friend , much appreciated !
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by:Patrick Bogers
ID: 40229261
You are very welcome! Till next time.
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