Re: Intersite Communications

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Responses inline.

--
Bharat Suneja
MCSE, MCT
--------------------------------


"MichaelW - Melb.Aus." <MichaelWMelbAus@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message news:5FE88F8C-44F3-41BB-8E52-B33444972546@xxxxxxxxxxxxxxxx
> Ok.. a little bit of reading and I think I am understanding you.
>
> from the way that I understand things now:
> If I send an e-mail from my 2003 mailbox to a 5.5 server is goes via an
> MTA/X.400/RPC connection (as provided by my 5.5 server's MTA).
**Correct
>
> If I send an e-mail from a 2003 mailbox to one on a different 2003
> mailserver (within my VPN) it should go via SMTP, but work out the other
> mailserver via an "A" record look up?
> It works this out becuase it knows that the mailserver for that user is
> the
> OTHER mailserver as this is in the Active Directory.
**Correct, looks up AD, finds out where the user's mailbox is located within
the same Exchange Organization

>
> I take it that this is all established based on routing groups then?
In mixed mode, Routing Group = Admin Group. Routing Groups cannot have
servers from multiple Admin Groups. In Native Mode they can.
Routing Group = message routing boundary, within a RG servers talk to each
other directly.
Between 2 Routing Groups, they go over a Connector (through the Bridgehead
specified on the Connector)
Servers from 2 different sites can be in the same Routing Group if they have
adequate reliable bandwidth between the sites.

If so,
> I have an Administrative Group called "Melbourne" (where my current
> mailserver resides - it has a Master (my 2003 server) and a member (my 5.5
> server) - they communicate via X.400/MTA...).
> When I do the same thing in Sydney, won't I have a "routing group" for
> Sydney too? In essence - I will have 2 "administrative groups" - one
> called
> Sydney and one called Melbourne...
**You can have 2 Routing Groups in one Administrative Group. The only time
you want to split the Admin Group is if you want to separate admin
responsibilities.

>
> So - how do I break the bind between the 2003 and 5.5 servers then?
> If I upgrade the Sydney 5.5 server - won't I be removing the "site
> Connector"?
> Do I assume that the Sydney 2003 server will "automagically" start sending
> e-mail to Melbourne 2003 via SMTP?
>
> I am looking for how the messages get sent here.
> The documents/books that I am reading are saying the same as you: Set it
> up
> and it all works....
> I intend to test it tomorrow (it's 5:00pm and I am tired!), but if anyone
> has done this - I would be keen to know how/if it works!
>
> "Bharat Suneja" wrote:
>
>> Hi Michael,
>>
>> To summarize, you are wondering how mail is routed between mailboxes
>> residing on Exchange Server 2003 boxes in different sites. The easy
>> answer:
>> directory lookup tells Exchange on which store/server the internal
>> recipient's mailbox resides.
>>
>> If you have different sites, you can connect them using a routing group
>> connector - it uses smtp.
>>
>> You don't need to setup sub-domains to route mail to the other site. For
>> internal mailboxes, delivery is not made based on DNS resolution - as it
>> would for external users/domains, where smtp defaults to doing a dns
>> lookup
>> for mx records.
>>
>> --
>> Bharat Suneja
>> MCSE, MCT
>> --------------------------------
>>
>> "MichaelW - Melb.Aus." <MichaelWMelbAus@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote
>> in
>> message news:31FD1E64-6165-4B09-8D5E-BEACD42CBE9D@xxxxxxxxxxxxxxxx
>> >I am running 4x Exchange 5.5 servers and 1x 2003 Server.
>> > Each 5.5 server resides in an "Administrative Group", and the 2003 is
>> > in
>> > one
>> > of those groups. ADC is installed and working - basically the whole
>> > company
>> > has been working on this for the past few months. (OMA/OWA running
>> > nicely
>> > too..)
>> > All servers (except EX2003) are on win2000. The AD is (currently)
>> > Win2000 -
>> > as are GC's. One DNS domain and one forest. All servers are on one big
>> > network (routed via VPN - no Internet connectivity between them....
>> > ping
>> > any
>> > of them via 192.168.xxx.xxx)
>> > The plan is to migrate everyone OFF 5.5 to 2003.
>> >
>> > My problem is fundimental on how I move forward from here.
>> > I am considering using a "swing server" to do the migrations (at
>> > opposite
>> > ends of Australia - so I will visit each site as the links aren't
>> > capable
>> > of
>> > supporting the 5+Gb of mailboxes just yet!) - drop a server in, migrate
>> > the
>> > users off the 5.5, drop 5.5 and reinstall with 2003, and migrate back.
>> > Seems
>> > pretty easy(?)
>> >
>> > Essentially, my question is:
>> > How do the Exchange 2003 server talk to each other once they loose the
>> > 5.5
>> > "site connectors"?
>> > I know, I could put a second server in each state, run 2003 on it and
>> > join
>> > it to that states Administrative Group - like I have in one state - and
>> > mail
>> > will pass back and forth using the 5.5 site connectors... it would
>> > work -
>> > but
>> > buying 5x servers just for e-mail is not on the cards... Currently, 5.5
>> > and
>> > 2003 are in the "Melbourne site". I am on 2003, and when I send mail it
>> > goes
>> > between 2003 and 5.5, then Melbourne to Sydney via 5.5 connector... I
>> > would
>> > assume that when I migrate Sydney.. then it will appear in the Sydney
>> > mailbox
>> > on their 2003 server (when I do it)...
>> > But how do I eliminate the 5.5 site connector - how will the 2003 talk
>> > to
>> > the 2003 in each site?
>> >
>> > I just cannot find anything that will answer that question.
>> >
>> > From what I guess is that it uses SMTP... which raises a fundimental
>> > problem.
>> >
>> > We have one "internal" dnsdomain (that we share with an external
>> > dnsdomain
>> > too).
>> > One domainname and no subdomains... so if I send an e-mail from a user
>> > on
>> > the Melbourne mailserver, how does SMTP resolve/route/know-how-to-route
>> > to
>> > a
>> > Sydney mailserver.
>> >
>> > In 5.5 - it looks up the mailbox x.400 address - see's what server that
>> > is
>> > on - send it to the MTA that puts it into the relevant queue to be sent
>> > by
>> > a
>> > site connector.... but there doesn't seem to be any beast.
>> > So I can only guess that it sends it to the smtp connector that
>> > established
>> > based on "WHAT?" to send it to XYZ server??!!!
>> >
>> > The way I see it - we either have to set up "subdomains" ie..
>> > melbourne.company.com.au AND sydney.company.com.au - and then set DNS
>> > up
>> > with
>> > MX records for both servers - that way if someone sends an e-mail to
>> > "sydney"
>> > SMTP knows how to route up there.
>> > OR - we have to get some sort of connector that says "if someone routes
>> > to
>> > the Sydney mailserver send it this way"...
>> >
>> > buggered if I can see how this is done...
>> >
>> > I don't see this domain changing to native mode any time in the next
>> > few
>> > months.. at least not until all the 5.5 servers are eliminated...
>> >
>> > This fundimental problem is frealking me out.... anyone give me some
>> > input?
>> > (PS: for now - the Administration groups are based around the states...
>> > I
>> > *could* eventually put them all in one group - but it will have to stay
>> > this
>> > way for now)
>> >
>> > any input (aside from the "well - you are just an idiot - at can't be
>> > done")
>> > would be greatly appreciated....
>>
>>
>>


.

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