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redirecting OWA to new exchange 2010 server through old Exchange 2003 server RRS feed

  • Question

  • Hey guys,

    There have been a few topics similarly related to this, but i cant find the exact solution for my situation.

    I have Exchange 2003 internal and external (in DMZ) servers. I have now implemented a new internal Exchange 2010 server with all the roles except Edge Role. If I move a mailbox over to the new exchange 2010, how do I access it via OWA? The 2010 owa doesnt work because the DNS is pointing to the external 2003 exchange, and there is no "webmail.domain.com/owa" site in that IIS.

    How would i let people who have moved their mailbox to the new 2010 exchange server to access their mailboxes via OWA via the external exchange 2003 server?

    Any help will be appreciated!

     

    Tuesday, June 18, 2013 9:30 AM

Answers

  • I don't think the problem is so much DNS, but the fact that you can generally only port map incoming https traffic to one internal destination using your router/firewall.

    Internally (from the LAN) there should be no problem. A user with a mailbox on the E2010 server just goes to https://e2010servername/owa . Externally, though, your DNS name really points to the public IP address of your router, and that can only direct them to one internal destination.

    One option would be to run the default web site on the E2003 server on a non-standard port, so that you can map that port number to the old server, and have the newer on running on the standard https port. But that means your E2003 users wil have to go to something like https://webmail.domain.com:444/owa .

    Or, get an ISA server, which can do the proxying based on the server name.


    blog.leederbyshire.com

    • Marked as answer by cara chen Tuesday, June 25, 2013 9:09 AM
    Tuesday, June 18, 2013 10:12 AM
  • Hello,

    Based on my knowledge, if you don't configure external url for exchange 2010 owa, there will not occur redirection. And the proxy is impossible.

    Here is the article for your reference.

    Upgrade Exchange 2003 to Exchange 2010


    Cara Chen
    TechNet Community Support

    • Marked as answer by cara chen Tuesday, June 25, 2013 9:09 AM
    Sunday, June 23, 2013 6:45 AM
  • Hey guys,

    There have been a few topics similarly related to this, but i cant find the exact solution for my situation.

    I have Exchange 2003 internal and external (in DMZ) servers. I have now implemented a new internal Exchange 2010 server with all the roles except Edge Role. If I move a mailbox over to the new exchange 2010, how do I access it via OWA? The 2010 owa doesnt work because the DNS is pointing to the external 2003 exchange, and there is no "webmail.domain.com/owa" site in that IIS.

    How would i let people who have moved their mailbox to the new 2010 exchange server to access their mailboxes via OWA via the external exchange 2003 server?

    Any help will be appreciated!

     

    You should be using the 2010 CAS servers, not the 2003 FE servers, for OWA, OA, ActiveSync, etc. The CAS will figure out where to send the connection based on the mailbox location.


    --- Rich Matheisen MCSE&I, Exchange MVP

    • Marked as answer by cara chen Tuesday, June 25, 2013 9:09 AM
    Sunday, June 23, 2013 3:16 PM

All replies

  • I don't think the problem is so much DNS, but the fact that you can generally only port map incoming https traffic to one internal destination using your router/firewall.

    Internally (from the LAN) there should be no problem. A user with a mailbox on the E2010 server just goes to https://e2010servername/owa . Externally, though, your DNS name really points to the public IP address of your router, and that can only direct them to one internal destination.

    One option would be to run the default web site on the E2003 server on a non-standard port, so that you can map that port number to the old server, and have the newer on running on the standard https port. But that means your E2003 users wil have to go to something like https://webmail.domain.com:444/owa .

    Or, get an ISA server, which can do the proxying based on the server name.


    blog.leederbyshire.com

    • Marked as answer by cara chen Tuesday, June 25, 2013 9:09 AM
    Tuesday, June 18, 2013 10:12 AM
  • It's pretty tricky. Because its the CEO that needs his IPhone/Tablet connected to his exchange constantly, so I dont want to chop and change too much. We will be getting an external E2010 as well which means he would have to change again .

    I wanted to move the internal first, then tackle the external afterwards. Do you think I should set up the external as well and route the new OWA domain through there. So when his mailbox gets moved, He only has to change it once?

    Tuesday, June 18, 2013 11:23 AM
  • Hello,

    Based on my knowledge, if you don't configure external url for exchange 2010 owa, there will not occur redirection. And the proxy is impossible.

    Here is the article for your reference.

    Upgrade Exchange 2003 to Exchange 2010


    Cara Chen
    TechNet Community Support

    • Marked as answer by cara chen Tuesday, June 25, 2013 9:09 AM
    Sunday, June 23, 2013 6:45 AM
  • Hey guys,

    There have been a few topics similarly related to this, but i cant find the exact solution for my situation.

    I have Exchange 2003 internal and external (in DMZ) servers. I have now implemented a new internal Exchange 2010 server with all the roles except Edge Role. If I move a mailbox over to the new exchange 2010, how do I access it via OWA? The 2010 owa doesnt work because the DNS is pointing to the external 2003 exchange, and there is no "webmail.domain.com/owa" site in that IIS.

    How would i let people who have moved their mailbox to the new 2010 exchange server to access their mailboxes via OWA via the external exchange 2003 server?

    Any help will be appreciated!

     

    You should be using the 2010 CAS servers, not the 2003 FE servers, for OWA, OA, ActiveSync, etc. The CAS will figure out where to send the connection based on the mailbox location.


    --- Rich Matheisen MCSE&I, Exchange MVP

    • Marked as answer by cara chen Tuesday, June 25, 2013 9:09 AM
    Sunday, June 23, 2013 3:16 PM