EWS: unexpected SOAP validation error from Exchange 2013 - web-services

Question

I make a request with JAX-WS:
GetItemType itemRequest = new GetItemType()
.withItemShape(new ItemResponseShapeType()
.withBaseShape(DefaultShapeNamesType.ID_ONLY)
.withAdditionalProperties(new NonEmptyArrayOfPathsToElementType()
.withPath(objectFactory.createFieldURI(new PathToUnindexedFieldType()
.withFieldURI(UnindexedFieldURIType.ITEM_WEB_CLIENT_EDIT_FORM_QUERY_STRING)
)
)
)
)
.withItemIds(new NonEmptyArrayOfBaseItemIdsType()
.withItemIdOrOccurrenceItemIdOrRecurringMasterItemId(new ItemIdType()
.withId(id)
)
);
Which yields a soap message:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<ns3:MailboxCulture xmlns:ns3="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ns2="http://schemas.microsoft.com/exchange/services/2006/messages">nb-NO</ns3:MailboxCulture>
</soap:Header>
<soap:Body>
<GetItem xmlns="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:ns2="http://schemas.microsoft.com/exchange/services/2006/types">
<ItemShape>
<ns2:BaseShape>IdOnly</ns2:BaseShape>
<ns2:AdditionalProperties>
<ns2:FieldURI FieldURI="item:WebClientEditFormQueryString"/>
</ns2:AdditionalProperties>
</ItemShape>
<ItemIds>
<ns2:ItemId Id="AQAZAEF4ZWwuV2F0aG5lQHNwYXJlYmFuazEubm8ARgAAA7k+kh3x38JJgjb3IcQO3bAHAP4YJIRG6m5GkZN2+/hve1MAAAIBEAAAAP4YJIRG6m5GkZN2+/hve1MAAAIbBgAAAA=="/>
</ItemIds>
</GetItem>
</soap:Body>
</soap:Envelope>
And get this response:
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<s:Fault>
<faultcode xmlns:a="http://schemas.microsoft.com/exchange/services/2006/types">a:ErrorSchemaValidation</faultcode>
<faultstring xml:lang="nb-NO">The request failed schema validation: The 'FieldURI' attribute is invalid - The value 'item:WebClientEditFormQueryString' is invalid according to its datatype 'http://schemas.microsoft.com/exchange/services/2006/types:UnindexedFieldURIType' - The Enumeration constraint failed.</faultstring>
<detail>
<e:ResponseCode xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">ErrorSchemaValidation</e:ResponseCode>
<e:Message xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">The request failed schema validation.</e:Message>
<t:MessageXml xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<t:LineNumber>1</t:LineNumber>
<t:LinePosition>534</t:LinePosition>
<t:Violation>The 'FieldURI' attribute is invalid - The value 'item:WebClientEditFormQueryString' is invalid according to its datatype 'http://schemas.microsoft.com/exchange/services/2006/types:UnindexedFieldURIType' - The Enumeration constraint failed.</t:Violation>
</t:MessageXml>
</detail>
</s:Fault>
</s:Body>
</s:Envelope>
So it seems to not like the value item:WebClientReadFormQueryString, but this seems correct to me, according to the enumeration in types.xsd from EWS:
<xs:simpleType name="UnindexedFieldURIType">
<xs:restriction base="xs:string">
...
<xs:enumeration value="item:WebClientReadFormQueryString"/>
Does anyone understand this validation error, or is it a bug?
Exchange version is 15.0.913.19

Answer 1

Try adding a RequestServerVersion element in your SOAP header and setting it to at least Exchange2010.