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Using both Exchange 2003 AND 2007?

Posted on 2007-11-15
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Last Modified: 2010-03-06
If a small organization is running Exchange 2003 on a server, and they purchased exchange 2007 planning on using 2007 as a front end without realizing this setup isn't supported, what are their options?
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Question by:twcadmin
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15 Comments
 
LVL 22

Expert Comment

by:ATIG
ID: 20292172
I am not sure what you mean when you say 2007 as a FE is not supported.

Exchange 2007 can proxy to a 2003 BE server with no problems if its running the CAS role only.

If you load the mbx and CAS then you will have a problem with exprox not redireting to the 2003 server properly but any mbx on 07 will be fine.

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LVL 5

Author Comment

by:twcadmin
ID: 20292866
Ok then is it possible to configure the 2007 as a FE that holds received messages in a queue when the BE is down?
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LVL 22

Expert Comment

by:ATIG
ID: 20295192
Exchange 2007 has been slip into roles now ....

each role does a different function
CAS= OWA,Imap,pop
Hub = smtp
mbx = mail stores
Edge - smtp spam gateway
um - unified messaging

How about you state what you are attempting to do, because front end to me is your OwA server.........

but if you want to use 2007 as you BH or edge smtp server then yes you can...... If you want o use 2007 as an edge server yes you can......

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LVL 5

Author Comment

by:twcadmin
ID: 20299098
currently there is an exchange 2003 server doing everything so this obviously isn't good because if something happens to the server we have a lot of downtime. An when the server is simply restarted because of updates, thats time that the server is down and can't receive email. exchange 2007 and associate CALs were purchased so i'm tryign to think of how it can be used best. I was thinking of something that simply receives email while the 2003 server is restarting and to host OWA. But i'm open to any options that provide failover/redundancy.
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LVL 22

Expert Comment

by:ATIG
ID: 20299210
The best solution would be to phase out 2003, I dont know if the box can be reused which will allow you do use LCR, CCR, or SCR (SP1) however CCR can only have the mbx roll on it.

I dont know budget but you can use VMware ESX to do a lot for you.....

Any server acting as a smtp hub will queue the mail if the store is down until it times out....

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LVL 5

Author Comment

by:twcadmin
ID: 20302917
i dont know what lcr ccr or scr is but i guess i'll look it up. I already use virtual server for virtualization but i dont see what virtualization can do that a physical machine can't as far as this goes. Also, i would like to phase out 2003 altogether but i wanted to try to find a solution that would let me use all licenses so i'm not wasting anything.
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LVL 22

Expert Comment

by:ATIG
ID: 20303315
LCR - local continuous replication  - makes a copy of the database to another local disk

CCR - replicates between 2 servers - cluster

SCR - replicates from one node to another non cluster

configured properly 2 esx servers clustered can do magic ps ESX is the only one the does 64 bit virtuals
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LVL 5

Author Comment

by:twcadmin
ID: 20304495
But again i only have 1 server license for 2003 and 1 server license for 2007. SO if they don't have ability to cooperate in these ways on physical machines, virtual machines won't work either because the licensing doesnt match up. Unless those replication technologies that you are talking about can be used with 2003 and 2007 together.
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LVL 22

Expert Comment

by:ATIG
ID: 20304627
You talking OS vs Exchange.......

I would suggest ISA over the edge server, because the hub transport and also do antispam......

ISA can publish your internal access OWA,Imap,etc... along with smtp

You could try some type of NAT in your DM but I dont knowquite how that will work for you.

but for what you want to do I believe you will need more than just a single server which is why I talked about virtual but that does not change you liscense model.

ISA runings on 32 Windows and Exchange 2007 requires 64 but windows which mean they cannot be installed on the same server.

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LVL 5

Author Comment

by:twcadmin
ID: 20305359
i have enough physical servers that i can dedicate to exchange i just need to know..how can i best utilize BOTH exchange 2003 AND 2007 to provide the configuration for what i currently have.

When I said i have 1 server license for 2003 and 1 server license for 2007 i am not talking OS, i am talking exchange SERVER. 32 and 64 bit doesnt matter either because i have both. Lastly, I don't know how ISA even got involved. Thank you for your input but unless you can tell me how i can best use exchange 2003 and exchange 2007 together, then you are no help, but thank you for trying.
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LVL 22

Expert Comment

by:ATIG
ID: 20305971
ISA got involved because you need to proxy to your internal network and you where trying to do this with your edge server.....
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LVL 5

Author Comment

by:twcadmin
ID: 20312708
But this can also be done with exchange acting as a front end. Why would I buy additional software if it can be done with what I already have?
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LVL 22

Expert Comment

by:ATIG
ID: 20316116
I thnk I got this post crossed with another one I was answering that the guy had back to back firewall and was doing somthing with edge :P
hehe... so my last few posts prob dont make senese :P)
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LVL 5

Author Comment

by:twcadmin
ID: 20991149
Let me rephrase my question, without purchasing additonal software, what ways can i get exchange 2003 and 2007 working together that would actually make sense?
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LVL 22

Accepted Solution

by:
ATIG earned 2000 total points
ID: 20993734
without reading back up the chain......

Exchange 2003 and 2007 work togethor just fine and there are no requirements for any additional tools or applications.

You would first need to deploy an Exchange 2007 CAS server this will allow users to proxy to either 2003 or 2007. I would suggest looking at the 2007 deployment guide.

The only issue becomes if you have a all in 1 box running Ex 2007 it will not proxy properly to a Ex 2003 server in which case you have 2 options 1. move all users at once or 2 have to urls during the transition.
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