Exchange mail routing / Hub Transport Servers

12 Mar 2009 3:45 AM

jprstokato

Our Exchange organisation currenlty consists of the following:

Local Site 1:     1 X Exchange 2007 Server (HT/ CAS/ MBX)
Remote site 2:    1 X legacy Exchange 2000
Remote site 3:    1 X Exchange 2007 Server (HT/ CAS/ MBX)
Remote site 4:    no Exchange Server (mailboxes hosted in local site 1)

Exchange 2000 is currently in the process of being decommissioned
My company is currently planning to host all our site2 user mailboxes on our
local Exchange 2007 server.
We are also currently planning CCR for our local site, and an additional
local HT / CAS Server

In terms of capacity this is possible, however Iâ€™m concerned about mail
routing for remote sites..(assuming that we will be a native Exchange 2007
organisation shortly)
Our local Exchange 2007 Server acts as HT for site 4 and will shortly do so
for site 2 (after we remove the final Exchange 2000 server).
My question is should we implement an additional HT / CAS Server for each
remote site, or will an additional local HT / CAS server suffice?

Many thanks

12 Mar 2009 6:58 PM

Ed Crowley [MVP]

Every AD site requires its own CA and HT role servers, which can be on the
same box if it can handle the load, and you should consider two of each role
in a site for redundancy. If the server is not clustered it can host all
three roles, MB, CA and HT, subject to load, but you would not have any
redundancy.

--
Ed Crowley MVP
"There are seldom good technological solutions to behavioral problems."
..

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"jprstokato" <jprstok***@discussions.microsoft.com> wrote in message
news:DDB29249-BF73-49F2-B04B-858B6EC87FBF@microsoft.com...
> Our Exchange organisation currenlty consists of the following:
>
> Local Site 1: 1 X Exchange 2007 Server (HT/ CAS/ MBX)
> Remote site 2: 1 X legacy Exchange 2000
> Remote site 3: 1 X Exchange 2007 Server (HT/ CAS/ MBX)
> Remote site 4: no Exchange Server (mailboxes hosted in local site 1)
>
> Exchange 2000 is currently in the process of being decommissioned
> My company is currently planning to host all our site2 user mailboxes on
> our
> local Exchange 2007 server.
> We are also currently planning CCR for our local site, and an additional
> local HT / CAS Server
>
> In terms of capacity this is possible, however Iâ€™m concerned about mail
> routing for remote sites..(assuming that we will be a native Exchange 2007
> organisation shortly)
> Our local Exchange 2007 Server acts as HT for site 4 and will shortly do
> so
> for site 2 (after we remove the final Exchange 2000 server).
> My question is should we implement an additional HT / CAS Server for each
> remote site, or will an additional local HT / CAS server suffice?
>
> Many thanks