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Mac80

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Active Directory SIte/Domain Controllers

I need to understand the difference and issues with following scenario :

Two Domain controllers running at different location but belongs to same AD site e.g. Primary DC and DR DC.

Vs

Two Domain controllers running at different location and belongs  to two AD sites e.g. Primary DC at Site A and DR DC at Site B.

Thanks
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Seth Simmons
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Mac80

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Hi Seth,

I wrote this based on a DR scenario e.g. if the whole Primary office goes down running the AD site with two DCs (one located at the same place and other at DR site) Vs two AD sites each having its own DC.

I have been searching on net and getting an idea that for DR , its better to have AD in a separate site. I am not getting a clue why and thats why posted this question.

I am more concern on failover mechanism as if primary site goes down , what will have affect on both of the DC at different locations Vs DC having their own site. How Exchange and other MS services will work etc...

Would appreciate if you can explain that.
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