serializedForm :: Server was unable to process request

After the migration of a Microsoft Dynamics CRM 3.0 application to CRM 4.0 and redirecting the BizTalk CRM adapter to the new server we received the following error message from the CRM web service when sending messages:
ErrorCode:   0x80040203
serializedForm :: Server was unable to process request.
After a few hours of puzzling we found out that this exception was caused by the fact that the send message contained an empty element for a CrmDateTime field. For example:
<contact>
  <birthdate></birthdate>
</contact>
When the empty CrmDateTime elements where removed from the message everything runs smoothly again.
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One Response to serializedForm :: Server was unable to process request

  1. Dana says:

    thanks, i was crazy for one day from this errormessage

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