Exchange 2007 CAS Proxying Design

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Jesus Martin - 15 Feb 2007 20:23 GMT

Hi,

I would like to know your feedback and whether this scenario could or
couldn't work

customer has 3 AD Sites geographically dispersed.

Site 1 is connected to Internet but does not have any mailboxes - It would
have 1 CAS/HT server
Site 2 does have 1000 mailboxes - It would have 1 CAS/HT Server + 1 node of
a CCR Cluster
Site 3 does have 1000 mailboxes - It would have 1 CAS/HT Server + 1 node of
a CCR Cluster

there is a VLAN configured between Site 2 and Site 3 so CCR is possible

my question is, Can they setup just 1 CAS/HT server in site 1 (no mailbox
server) which proxies the OWA, and the other Internet services requests to
other CAS/HT in other sites and then those sending the requests to the
relevant MBX servers?

Thanks

Reply to this Message

Mark Arnold [MVP] - 15 Feb 2007 20:38 GMT

>Hi,
>
[quoted text clipped - 18 lines]
>
>Thanks

No.
You will need a CAS in each location.
Site 1 CAS will send to Site 2 CAS and Site 2 CAS will get the
information from the Mailbox server and send it back through the CAS.

I have slide from the "Get Ready for blah blah" roadshows if you want
it and haven't been to the events in Europe.
Email me if you want it.

Reply to this Message

Jesus Martin - 15 Feb 2007 21:10 GMT

Thanks Mark, would appreciate if you can send me the presentation you are
talking about

I think I was not clear in my question, so this means that if I have 3 CAS,
1 per location but just 2 MBX servers in Site 2 and Site 3 would not work?

problem here is that they have a huge Internet connection 100 Mpbs in the
smallest site and they don't want to deploy a MBX server on it

they would like to deploy a CAS in the site with the Internet connection
which proxies the user requests to the other 2 CAS servers and then those
redirect the queries to the MBX in Site 2 and 3

is this possible?

cheers

>>Hi,
>>
[quoted text clipped - 29 lines]
> it and haven't been to the events in Europe.
> Email me if you want it.

Reply to this Message

Mark Arnold [MVP] - 15 Feb 2007 21:29 GMT

>Thanks Mark, would appreciate if you can send me the presentation you are
>talking about
>
>I think I was not clear in my question, so this means that if I have 3 CAS,
>1 per location but just 2 MBX servers in Site 2 and Site 3 would not work?

That's fine. The CAS in each location is the key. The CAS in site 1
needs to be there otherwise OWA from the Internet isn't going to work.

>problem here is that they have a huge Internet connection 100 Mpbs in the
>smallest site and they don't want to deploy a MBX server on it
[quoted text clipped - 4 lines]
>
>is this possible?

No probs, just go with the MBs where you want and the CAS's where I
told you. You understood just fine.

>cheers
>
[quoted text clipped - 31 lines]
>> it and haven't been to the events in Europe.
>> Email me if you want it.

Reply to this Message