Hello , I am trying to export My users form a CSV file to FIM Portal so i got the following error messages. 

Does anyone have an idea about what can be the issue 

Best regards 

Fault Reason: The request message contains errors that prevent processing the request.\r\n\r\nFault Details: <RepresentationFailures xmlns="http://schemas.microsoft.com/2006/11/ResourceManagement" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><AttributeRepresentationFailure><AttributeType>MailNickname</AttributeType><AttributeValue>michael.jackson@adatum.com</AttributeValue><FailureMessage>Exception: ValueViolatesRegularExpression Target(s): Micheal Jackson
Stack Trace: Microsoft.ResourceManagement.WebServices.Exceptions.InvalidRepresentationException: ValueViolatesRegularExpression
   at Microsoft.ResourceManagement.ActionProcessor.ActionDispatcher.ValidateObjectAttributes[T](RequestType request, Guid objectIdentifier, String objectTypeName, IEnumerable`1 parameters, OperationType operationType)
   at Microsoft.ResourceManagement.ActionProcessor.ActionDispatcher.ValidateInputRequestCreate(RequestType request)
   at Microsoft.ResourceManagement.ActionProcessor.ActionDispatcher.ProcessInputRequest(RequestType request)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.ExecuteAction(RequestType request)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.ExecuteAction[ResponseBodyType](RequestType request)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.DispatchRequest[ResponseBodyType](RequestType request, Guid requestIdentifier, Object redispatchSingleInstanceKey, Boolean isRedispatch)
   at Microsoft.ResourceManagement.WebServices.RequestDispatcher.DispatchRequest[ResponseBodyType](RequestType request)
   at Microsoft.ResourceManagement.WebServices.ResourceManagementService.Create(Message request)</FailureMessage><AttributeFailureCode>ValueViolatesRegularExpression</AttributeFailureCode><AdditionalTextDetails>The specified attribute value does not satisfy the regular expression.</AdditionalTextDetails></AttributeRepresentationFailure><CorrelationId>6b91286f-4b45-4097-8c1d-38d699a968c5</CorrelationId></RepresentationFailures>

Hello,

your MailNickname contains an @. (Looks like a complete email-address)

mailNickname should be only the prefix of the mail-address.

Also take a look to the Attribute Definition of Schema (String Validation Pattern)

-Peter