Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: The located assembly's manifest definition with name 'Microsoft.Exchange.OMA.UserInterface' does not match the assembly reference.

User's solution

This works!

Microsoft KB article
You cannot connect to Outlook Mobile Access on a server that is running Exchange Server 2003:
http://support.microsoft....;spid=1773

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