PC adding to domain

I have build up a parlell exchange server and i am restoring exchange backup from live running exchange to  parlell exchange server . My plan is to replace live exchange server with parlell exchange server if in case live running server fails. My problem is adding compuer object  to parlelll exchange server . We have 200 users in network. This parlell exchange server i have not connected to existing network . I am trying to add PC with same name and IP of exisiting PC names  , but i am using same PC to do this job. Problem what i am facing is that the last name addedd only exists in domain. I want to know whether MAC address of NIC is being checked while adding to domain. Also , whether this is creating problem.
WILSON123JAsked:
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Lee W, MVPConnect With a Mentor Technology and Business Process AdvisorCommented:
Neverfail:
http://www.neverfailgroup.com/

DoubleTake:
http://www.doubletake.com/

These are not inexpensive products - but instead of two licenses for exchange, you only need one.  You still need two licenses of Windows Server though.

Basically, one server sits idle waiting for the other to fail, but transferring necessary data practically real time so that should the system fail, the backup system would "restore" itself as the failed system.  Depending on your network performance, your outage could be as little as a couple of minutes.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
This is not going to work.
You CANNOT have two machines on the same domain with the same name and same IP.  AD doesn't do anything with the MAC address - but it does use uniquely generated security IDs (SIDs) and no two systems (or users) can have the same SID.

If you want exchange redundancy I suggest you look into two options...
1.  Consider Clustering
2.  Consider a product like double take or neverfail - two products that will mirror the exchange server to another system and keep it live.

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WILSON123JAuthor Commented:
Dear Leew

Please provide me more details on second option. I mean how to go about it.

Rgds
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slam69Commented:
or consider using netbios alias
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Lee W, MVPTechnology and Business Process AdvisorCommented:
slam69:

How would a netbios alias allow mailboxes to live on two servers?  That's what would be needed... and that cannot be done in a standard exchange config (and I've never heard of it in any other config).
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slam69Commented:
Apologies leew i only scan read er i came back teh question and saw the 2 pcs, 2 ips same number scenario was only after i came back I took in whole scenario about mirroring excahnge servers so my bad!!
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WILSON123JAuthor Commented:
I will go for neverfail
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