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Exchange 2010 Environment - MultiServer Planning

Posted on 2014-01-23
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Last Modified: 2014-02-25
Have a client that wants us to move him from Lotus Domino to Exchange.
He has also stipulated that he wants redundancy (i.e. 2 Exchange Servers in case one fails).

I have deployed multiple single server Exchange environments, but have not had the opportunity to have an environment that has more than one.

I would like someone to explain the best way to set this up, what the options are and what are the pros/cons.

Thanks
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Question by:tech911
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10 Comments
 
LVL 17

Expert Comment

by:Spartan_1337
ID: 39803701
tricky question, does he want redundancy on every role?

There are CAS arrays for client access redundancy and DAG for database redundancy.
Are we also talking about local or multi-site resiliency?
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LVL 7

Expert Comment

by:SvenIA
ID: 39803705
What have you got in your network? Do you use Hyper-V or VMware? How many hosts? Cluster?
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LVL 46

Expert Comment

by:Sjef Bosman
ID: 39803839
<rant>
I have yet to see the first Domino-to-Exchange migration success story with an acceptable ROI and a lower TCO...
</rant>

If all the client wants is mail, a move to Exchange is wasting money: all you do is you swap a great groupware environment for a good mail server.
Why not move to the cloud, e.g. Gmail? They'll take care of redundancy, it's all in the contract.

Good luck!
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Author Comment

by:tech911
ID: 39804802
Here are the specifics
35 users
1 AD Server
Some Virtualization using VMWare ESXi 5
Both of the servers will have dedicated hardware (i.e. Their own server)

To answer the <rant>
The reason for the migration to Exchange is driven by a piece of software that we are running that is only compatible with Exchange.
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LVL 46

Expert Comment

by:Sjef Bosman
ID: 39805900
Thanks for your reply. I'd estimate the migration to cost at least 20-30K$, not including the cost of the licences and additional hardware, new procedures, temporary loss of user productivity, Notes applications that have to be rebuilt, etc. So the additional cost of this piece of software that is locked in with Exchange are worth it? Ok...

Did you investigate the available coexistence solutions?
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LVL 3

Author Comment

by:tech911
ID: 39806597
This particular client has no concern for the cost.

IF their Exchange server were to go down it would cost them $50K - $100K per hour, so $30K is not a big deal to them.

They want it done...Yesterday.

Does anyone have a basic layout of how to do this, don't worry about the cost just a solution that works is great.

Does it have to be clustered
Is there a Parent/Child Replication Scenario


Thanks
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LVL 17

Expert Comment

by:Spartan_1337
ID: 39806640
Multi-server is clustered by default, especially with Exchange.
Depending on the OS of choice, 2008 (Enterprise) or 2012 Standard or above will suffice.
For Exchange, it's either Standard or Enterprise (less DB's on standard)

For true redundancy, OS will cluster DB's with Windows Clustering and for client access a hardware load balancer works best.

Can you consider using Exchange 2013? Or does it only work with 2010?

Once we have the answer, a better diagram can be shown.
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Author Comment

by:tech911
ID: 39807938
Lets stick with 2010 I know it works for sure.
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Spartan_1337 earned 500 total points
ID: 39812005
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Author Comment

by:tech911
ID: 39813845
Roger that will do tomorrow and advise.
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