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Exchange 2003-2010 EAS URL

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  • Exchange 2003-2010 EAS URL

    In the midst of a 2003-2010 migration. I have over 100 user mailboxes on 2003 and a few on 2010 (including mine). OWA works fine for all and 2003 mailbox users use the legacy URL for that. OA works fine for 2003 and 2010 users as well. The problem I'm having is with EAS.

    EAS external DNS URL ( points to Exchange 2003 server and 2003 mailbox users have no activesync problems and all is well. When I point the EAS url in the firewall to the Exchange 2010 server then 2003 mailbox users have very very slow email synch times or none at all, but then the 2010 mailbox users have no problems with EAS. I thought that by pointing the EAS URL to Exchange 2010 in the firewall it would proxy requests for 2003 mailbox users.

    How can I solve this problem. Should I change the EAS internal URL to the same as the external one? Currently the internal EAS URL is https://CAS2010.domain.local/Microsoft-Server-ActiveSync

    External EAS URL is: (yes it's http not https, the company wanted it that way, please dont ask me why).

    btw, the URL's are as follows:

    EAS uses

    OWA users connect to and are redirected to to 2003 mailbox server.

    OA users use in their rpc/http settings in Outlook2007

    I only have problems with EAS as explained above. Maybe I should change the internal EAS to ?

    Thank you all!

  • #2
    Re: Exchange 2003-2010 EAS URL

    The first prerequisite for EAS is to configure integrated authentication on the Exchange 2003 mailbox servers for EAS to work properly with Ex2010 during coexistence. This hotfix needs to be installed on any Exchange 2003 servers that host mailboxes used by ActiveSync device users.

    Failing that you could use a separate URL for Ex2010 and use auto-discover to configure the devices.

    Use the remote connectivity analyser to trouble shoot further. Also check the IIS logs on either front end/CAS server to see if mobile device requests are hitting the server at all. I would also ensure the virtual direrctory on the Ex2003 side is also using SSL for simplicity's sake. As Ex2010 uses SSL by default.


    • #3
      Re: Exchange 2003-2010 EAS URL

      Integrated authentication is enabled on the Exchange 2003 server, but the hotfix is still required? That MS artice also says if its between a Exchane 2007 and 2003 server. Mine ius 2010-2003.
      The ExRCA passes everything except the last steps times out.

      IIS logs on the CAS show they are touching the server and I think also it is proxying:

      2011-11-11 01:29:34 OPTIONS /Microsoft-Server-ActiveSync/default.eas & ull%2f0%25%2cCAS%3a%24null%2f%24null%2f0%25%2cAB%3 a%24null%2f%24null%2f0%25%2cRPC%3a%24null%2f%24nul l%2f0%25%2cFC%3a1000%2f0%2cPolicy%3aDefaultThrottl ingPolicy%5F2334f855-d1cf-4df4-9974-f0d796a90626%2cNorm%5bResources%3a(DC) 80 xyz\wsol Apple-iPhone3C3/805.600 200 0 0 100210

      2011-11-11 01:25:35 POST /Microsoft-Server-ActiveSync/default.eas User=asmith&DeviceId=ApplC39GFZ4RDTF9&DeviceType=i Phone&Cmd=Sync& ull%2f0%25%2cCAS%3a%24null%2f%24null%2f0%25%2cAB%3 a%24null%2f%24null%2f0%25%2cRPC%3a%24null%2f%24nul l%2f0%25%2cFC%3a1000%2f0%2cPolicy%3aDefaultThrottl ingPolicy%5F2334f855-d1cf-4df4-9974-f0d796a90626%2cNorm_ 443 xyz\asmith Apple-iPhone4C1/901.405 200 0 0 107974
      Last edited by open24hrs; 16th November 2011, 22:02.