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Im sure when you go to raise the level it will only allow you whats possible. You could try &nbsp;on both and see what it allows before committing.
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Sorry that does not make sense. What do you mean I can try both? I wanted to know if AD cares that one DC is ENT 2008 R2 and the other STD 2008 R2. I would of course use the primary DC (ENT 2008 R2) to do the domain/forest raise, but will the fact that the other is 2008 R2 but STD edition matter, i.e. do they need to be only on the same o/s version (2008 R2 and both have that) or also on the same release version?
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Okay thanks that clarifies it.
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I had this question after viewing <a href="https://www.experts-exchange.com/questions/28959427/Service-Pack-Levels-for-Domain-Controllers-befpre-raising-Domain-Forest-Function-Levels-frm-2003-to-2008-R2.html" rel="ugc">Service Pack Levels for Domain Controllers befpre raising Domain/Forest Function Levels frm 2003 to 2008 R2</a>.<br />
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Follow-up question... Is there going to be an impact from the fact that one of the DC's is running 2008 R2 ENTERPRISE and the other 2008 R2 STANDARD?????
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I had this question after viewing Service Pack Levels for Domain Controllers befpre raising Domain/Forest Function Levels frm 2003 to 2008 R2 (https://www.experts-exchange.com/questions/28959427/Service-Pack-Levels-for-Domain-Controllers-befpre-raising-Domain-Forest-Function-Levels-frm-2003-to-2008-R2.html).

Follow-up question... Is there going to be an impact from the fact that one of the DC's is running 2008 R2 ENTERPRISE and the other 2008 R2 STANDARD?????

STD 2008 R2 on one DC vs ENT 2008 R2 on other DC for raising domain and forest level!!!

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.