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back to NT 4 domain

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HI,
I want to upgrade my NT 4 domain to 2k server .First I will promote one of my BDC to PDC and then I will upgrade it .I will put one of BDC`s offline during upgrade .The question is : If I did some thing wrong and I want to get back to NT domainenvironment ,is it possible to shut the 2k and put the offlined BDC online and then promote it to PDC ?
Thanks.

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back to NT 4 domain

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Yes. it’s possible.
Don’t forget to sync the domain before taking the BDC offline. This is the first step.

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There is no need to promote a Bdc to Pdc prior to upgrade.As you have stated you have a bdc.Before taking bdc offline force syncronize,Take you bdc offline and start you upgrade thereafter,since your bdc has updated sam(read only)If you upgrade collpses
for some reason or you want to revert,promote you offline bdc,you network is unaffected.Hope that helped

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