[2007 to 2010 Migration][EWSMA] Accessing mailboxes on a 2007 server via 2010 Client Access server RRS feed

  • Question

  • Per the Exchange 2010 Planning guide on, client access servers have to be migrated first.

    I have a test environment with 2010 CAS, and users on 2007 mailbox servers. I am getting this error when I try to access the mailbox of a 2007 user:
    The version of Exchange when instantiating the service handle is ExchangeVersion.Exchange2007_SP1.

    <Trace Tag="EwsResponse" Tid="4" Time="2011-08-15 23:04:50Z" Version="14.02.0051.000">
     <?xml version="1.0" encoding="utf-8"?>
     <s:Envelope xmlns:s="">
       <h:ServerVersionInfo MajorVersion="14" MinorVersion="1" MajorBuildNumber="323" MinorBuildNumber="6" Version="Exchange2010_SP1" xmlns:h="" xmlns="" xmlns:xsi="" xmlns:xsd="" />
      <s:Body xmlns:xsi="" xmlns:xsd="">
       <m:FindItemResponse xmlns:m="" xmlns:t="">
         <m:FindItemResponseMessage ResponseClass="Error">
          <m:MessageText>An internal server error occurred. The operation failed.</m:MessageText>
           <t:Value Name="InnerErrorMessageText">The Client Access server version doesn't match the Mailbox server version of the resource that was being accessed. To determine the correct URL to use to access the resource, use Autodiscover with the address of the resource.</t:Value>
           <t:Value Name="InnerErrorResponseCode">ErrorWrongServerVersion</t:Value>
           <t:Value Name="InnerErrorDescriptiveLinkKey">0</t:Value>
           <t:Value Name="AutodiscoverSmtpAddress"></t:Value>

    The version of exchange when instantiating the service handle is ExchangeVersion.Exchange2007_SP1.

    Monday, August 15, 2011 11:13 PM

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