When you check a Microsoft Exchange Web Services (EWS) response for ResolveNames in a Microsoft Exchange Server 2010 environment, you may find that the Culture element is added in the wrong order in the XML. This breaks the schema validation.
This issue occurs because the Culture element is inserted into the wrong place of the XML.
To fix this issue, install Update Rollup 17 for Exchange Server 2010 Service Pack 3.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.