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Active Domain and DC from 2003 to 2008 R2

Hello,

Due to operational needs, I am required to upgrade a server, by tossing extra RAM and a couple of SAS disks.

Also, i now need to run Win 2008 R2.
Currently have this server running as the DC with AD, DNS and FISMO roles on a 2003 32 bit.

I have a second machine that will be used for something else (different hardware specs), where I can temporarily transfer the DC settings and data.

Once the OS is reinstalled on the old server, I can import back the AD and DC settings and data to its original one, now running 2008 R2.

Question is - how?
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vmdude
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The best option is to install 2008R2 on another machine, then DCPROMO the new machine and move the FSMO roles to it.

yes.. I suppose its possible, that having moved all the roles from the existing 2003 server you can demote that it, then install 2008 R2 onto it and then move the roles over again, then demote the temporary machine again... but do bear in mind for redundancy you may want to keep two DCs.
Very true and this is the preferred way however if they only have 2 servers (as was mentioned) then they might not have that choice.
Well that's their choice of course... so long as they are aware of the consequences.
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pjso

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Thanks.
Will do as suggested!