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Migrating to Exchange server 2010, if you have multiple sites in AD do you need a hub transport server at each site?

Posted on 2011-03-22
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We are migrating to exchange server 2010.  We have multiple sites in our active directory sites and services.  Some of the site are just a handful of users but have a domain controller at the site.  Do you need  to install a hub Transport server at each site?

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Question by:demas
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by:Glen Knight
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You should have yes, and also a Client Access Server, but, it's not essential if you have HUGE bandwidth between them.

And for Exchange to work effectively you must have Active Directory Sites and Services configured correctly.
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by:Akhater
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no you should not,

installing a CAS without mailbox server is useless, the whole word is going towards consolidation so get 2 good datacenters and build a HA solutions and let all your users connect to these.
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by:Glen Knight
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I assumed they would be having mailbox servers at the site since there was no mention of them in the question.
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by:mattconroy
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You only need to have a Hub Transport Server in each site that has a Mailbox Server Role installed in that site.
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by:Auric1983
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demas,

Depending on the number of users and amount of bandwidth available between the sites, your smaller sites can connect to a main site for their mail with no exchange services installed locally.

If I were able to do my migration here over again, I would setup a DAG between my larger sites, so that Site A is replicating to Site B and vice versa for redunancy and availability.

For the smaller sites though, I just setup my users to run in cached mode and connect to the exchange server here over our WAN.
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by:Glen Knight
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There is no mention of mailbox placement so I assumed a mailbox server was in location at the remote site, which is why I suggested what I did.

If there is no mailbox server at the remote location then there is no need for a HT or CAS role to be there.
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by:demas
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Sorry just to be clear:

We have a datacentre which would host the mailbox server and the client access server and have a centralised Hub transport server.  We have 4 Sites none would have a mailbox server.  Im under the impression Exchange 2010 handles its routing through Active directory sites and services, hence why im unsure if a hub transport server should be placed on each site.  One site has a fast link, the other 3 sites have ok ish links.
Thanks
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Shouldn't all users have the same email signature?

You wouldn't let your users design their own business cards, would you? So, why do you let them design their own email signatures? Think of the damage they could be doing to your brand reputation! Choose the easy way to manage set up and add email signatures for all users.

 
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Glen Knight earned 500 total points
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If there is no Mailbox Server server at the 4 sites then there is no need for a hub transport server and in fact it would be redundant.
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by:Akhater
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I am always glad when demazter and I reach an agreement :)
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by:Glen Knight
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indeed, although the full extent of the requirement was not included in the original question
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by:Auric1983
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agreed, vague questions mean vague answers and lots of guessing
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by:demas
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Sorry I assumed some stuff, You know what they say about assuming!
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by:mattconroy
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I answered correctly FIRST but did not get the credit. Con someone please explain to me why this is.
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by:Akhater
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@mattconroy cool down bro :) if this is what you are basing yourself on I'm the first one who answred :D
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