Hello, We are getting the following erros: Event Type: Error Event Source: EXODBPC Event Category: None Event ID: 903 Date: 28-5-2011 Time: 11:12:53 User: N/A Computer: BGFS01 Description: The description for Event ID ( 903 ) in Source ( EXODBPC ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: EXOLEDB. Data: 0000: 05 00 00 00 .... Event Type: Error Event Source: DAVEXPC Event Category: None Event ID: 903 Date: 28-5-2011 Time: 11:12:53 User: N/A Computer: BGFS01 Description: The description for Event ID ( 903 ) in Source ( DAVEXPC ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: DAVEX. Data: 0000: 05 00 00 00 .... Does anyone know what this means and how we can solve this? Exchange 2007 sp3; Windows server 2003 r2 x64. The errors appear once a week. Thanks! Remco