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Using Exchange 2000 when the DC is down?

Posted on 2006-10-19
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Hi,

No sure if this can be done. I have two domains, let's call them domain1 and domain2. Both are Windows 2000 with an Exchange 2000 server in domain1.

What would happen to my exchange server if the domain1 DC went down? I have users in domain2 that are accessing mail on the exchange server in domain1. Since exchange is reliant on AD in it's domain, how could users in domain2 continue to get email from the exchange server in domain1? Is this possible? If so, how?

If an answer proves this is possible and gives me exact instructions on how to make this work I will award 500 points.

If an answer proves to me how this is not possible, I will award 125 points.

Thanks!
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Question by:funkyjoe1
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Sembee earned 2000 total points
ID: 17770267
Exchange will stop working shortly after the DC went down. Exchange 200x relies heavily on the domain for most of its operation, without a domain controller (if it is the only domain controller) then you have no domain.

The only way to ensure that Exchange continues to work is to have another global catalog domain controller. Even that wouldn't stop Exchange from misbehaving. Exchange locks on to a certain DC, and if that DC goes, it doesn't go looking for another DC for about 35 minutes.

The fact that users are in another domain has no bearing on this at all, as the Exchange server will not be able to find the other domain because the link between the domains is carried out by the domain controllers.

Therefore you either have to ensure that the single domain controller doesn't go down (which is almost impossible to do) or get a second domain controller that is also a global catalog.

Simon.
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