Obviously I have the same issue; I can't use the calender at all. Obviously it connects and transmits several calendar items, finally there is:

ERROR: reference to undefined XML name http://schemas.microsoft.com/exchange/services/2006/types::CalendarItemType
Source: resource://calendar/modules/calUtils.jsm -> file:///C:/Dokumente%20und%20Einstellungen/Stefan/Anwendungsdaten/Thunderbird/<email address hidden>/js/soapin.js
Line: 533

I highly would appreciate if this could be fixed, since I can't use TB otherwise :-(

Here's my full log:

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unknown [object Object]: User:XXX\xxxxxx

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unknown [object Object]: Server: https://XXX\<email address hidden>/EWS/Exchange.asmx

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[...]
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getInterfaces called

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[calCachedCalendar] Doing full sync for calendar https://XXX%<email address hidden>/EWS/Exchange.asmx
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getInterfaces called

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[...]
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getInterfaces called

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WARNING: getAttributeNodeNS() sollte nicht mehr verwendet werden. Verwenden Sie stattdessen getAttributeNS().
Quelldatei: chrome://messenger/content/messenger.xul
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getInterfaces called

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[...]
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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: Init

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getInterfaces called

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: queueRequest

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: queueRequest

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: do init

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getAccount

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: USER: XXX\xxxxxxxxx

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: setup req to https://XXX\<email address hidden>/EWS/Exchange.asmx user XXX\xxxxxxx

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getInterfaces called

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: Sending: <?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2007_SP1"/>
  </soap:Header>
  <soap:Body>
    <m:FindItem Traversal="Shallow">
      <m:ItemShape>
        <t:BaseShape>IdOnly</t:BaseShape>
        <t:AdditionalProperties>
          <t:FieldURI FieldURI="calendar:UID"/>
          <t:FieldURI FieldURI="calendar:CalendarItemType"/>
        </t:AdditionalProperties>
      </m:ItemShape>
      <m:Restriction>
        <t:IsEqualTo>
          <t:FieldURI FieldURI="item:ItemClass"/>
          <t:FieldURIOrConstant>
            <t:Constant Value="IPM.Schedule.Meeting.Request"/>
          </t:FieldURIOrConstant>
        </t:IsEqualTo>
      </m:Restriction>
      <m:ParentFolderIds>
        <t:DistinguishedFolderId Id="inbox"/>
      </m:ParentFolderIds>
    </m:FindItem>
  </soap:Body>
</soap:Envelope>

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: setup req to https://XXX\<email address hidden>/EWS/Exchange.asmx user XXX\xxxxxx

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getInterfaces called

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: Sending: <?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2007_SP1"/>
  </soap:Header>
  <soap:Body>
    <m:FindItem Traversal="Shallow">
      <m:ItemShape>
        <t:BaseShape>IdOnly</t:BaseShape>
        <t:AdditionalProperties>
          <t:FieldURI FieldURI="calendar:UID"/>
          <t:FieldURI FieldURI="calendar:CalendarItemType"/>
        </t:AdditionalProperties>
      </m:ItemShape>
      <m:ParentFolderIds>
        <t:DistinguishedFolderId Id="calendar"/>
      </m:ParentFolderIds>
    </m:FindItem>
  </soap:Body>
</soap:Envelope>

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: do init done

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {d974c99e-4148-4df9-8d98-de834a2f6462}

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {d974c99e-4148-4df9-8d98-de834a2f6462}

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getInterfaces called

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {081e31e0-a144-11d3-8c7c-00609792278c}

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {09b54ec1-d98a-49a9-bc95-3219e8b55089}

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Direct3D 9 DeviceManager Initialized Succesfully.
Driver: nv4_disp.dll
Description: NVIDIA GeForce 7600 GT
Version: 6.14.12.6099
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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {081e31e0-a144-11d3-8c7c-00609792278c}

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {09b54ec1-d98a-49a9-bc95-3219e8b55089}

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {bd9dc0fa-68ce-47d0-8859-6418c2ae8576}

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: IID: {651395eb-8612-4876-8ac0-a88d4dce9e1e}

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: getInterface

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making prompt: true

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ERROR: 'Method not implemented' when calling method: [nsIAuthPrompt2::asyncPromptAuth] = NS_ERROR_NOT_IMPLEMENTED
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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: reply

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <h:ServerVersionInfo MajorVersion="14" MinorVersion="1" MajorBuildNumber="339" MinorBuildNumber="2" Version="Exchange2010_SP1" xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"/>
  </s:Header>
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <m:FindItemResponse xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
      <m:ResponseMessages>
        <m:FindItemResponseMessage ResponseClass="Success">
          <m:ResponseCode>NoError</m:ResponseCode>
          <m:RootFolder TotalItemsInView="0" IncludesLastItemInRange="true">
            <t:Items/>
          </m:RootFolder>
        </m:FindItemResponseMessage>
      </m:ResponseMessages>
    </m:FindItemResponse>
  </s:Body>
</s:Envelope>

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: findItemReply: 0

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: reply

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2dee7ca4-06ab-4790-a502-b72d40e5cb0d/ICCAS: <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <h:ServerVersionInfo MajorVersion="14" MinorVersion="1" MajorBuildNumber="339" MinorBuildNumber="2" Version="Exchange2010_SP1" xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"/>
  </s:Header>
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <m:FindItemResponse xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
      <m:ResponseMessages>
        <m:FindItemResponseMessage ResponseClass="Success">
          <m:ResponseCode>NoError</m:ResponseCode>
          <m:RootFolder TotalItemsInView="661" IncludesLastItemInRange="true">
            <t:Items>
              <t:CalendarItem>
                <t:ItemId 
	
	[Many many CalendarItems...]

              <t:CalendarItem>
                <t:ItemId Id="AAMkADhkNzM1MDIxLWIzMzYtNDU1ZS05ODZhLTMxOWNhMjA4OGU2NABGAAAAAABritJAQ+EwQYMApbCCitwkBwAAtCJ9EyYOS6FEGRz5AllPAAAAIhrmAACRJs2Y36mqRLKeUBaKTiKxAVCAZobCAAA=" ChangeKey="DwAAABQAAABXglSAZ5kzTLkD+PBkFsRCAAL+LQ=="/>
                <t:UID>040000008200E00074C5B7101A82E00800000000F35F7CA6A0540248A577252F9622057210000000B68E0FA68E456040A5802644CB6175BD</t:UID>
                <t:CalendarItemType>Single</t:CalendarItemType>
              </t:CalendarItem>
            </t:Items>
          </m:RootFolder>
        </m:FindItemResponseMessage>
      </m:ResponseMessages>
    </m:FindItemResponse>
  </s:Body>
</s:Envelope>

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ERROR: reference to undefined XML name http://schemas.microsoft.com/exchange/services/2006/types::CalendarItemType
Source: resource://calendar/modules/calUtils.jsm -> file:///C:/Dokumente%20und%20Einstellungen/Stefan/Anwendungsdaten/Thunderbird/<email address hidden>/js/soapin.js
Line: 533
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