MSExchangeTransport EventID 25006

Hi all

I'm getting the following Error:

- System 

  - Provider 

   [ Name]  MSExchangeTransport 

  - EventID 25006 

   [ Qualifiers]  49156 

   Level 2 

   Task 16 

   Keywords 0x80000000000000 

  - TimeCreated 

   [ SystemTime]  2013-07-21T18:55:09.000000000Z 

   EventRecordID 365006 

   Channel Application 

   Computer xxxx 

   Security 


 EventData 

This is the only Error I get on my MSExchange server 2013 CU1. Does anyone know, how to fix that? 

Thanks for your help

Daniel