Hi maby someone solved this issue. I try to sync a particularly large contact list (10000+) from Outlook to SharePoint. This error don't occur if I try to do the sync in small batches. But when I try to sync all contacts i get errors and 2nd problem is that the error causes the sync to kick off again, which produces an endless stream of duplicate entries. All of our workstations and servers are patched and I have tried this with Office 2007 on XP. I get such errors: Task 'SharePoint' reported error (0x80070005) : 'Kontaktai - Kontaktai - Failed to copy one or more items because of an incompatible hyperlink. Hyperlinks must begin with http://, https://, mailto:, news:, ftp://, file://, or \. The failed items have been moved to the Local Failures folder. To view these items, press CTRL+6, and then expand the Sync Issues folder.' Task 'SharePoint' reported error (0x80004005) : 'An error occurred in this SharePoint List (Kontaktai - Kontaktai). Try updating the folder again. If the problem continues, contact the SharePoint site administrator. HTTP 500. The server returned the following error message: Exception of type 'Microsoft.SharePoint.SoapServer.SoapServerException' was thrown.' Task 'SharePoint' reported error (0x80004005) : 'The SharePoint List (Kontaktai - Kontaktai) cannot be found. If the problem continues, contact the SharePoint site administrator. HTTP 404.' Task 'SharePoint' reported error (0x80004005) : 'An error occurred in this SharePoint List (Kontaktai - Kontaktai). Try updating the folder again. If the problem continues, contact the SharePoint site administrator. HTTP 500. The server returned the following error message: Exception of type 'Microsoft.SharePoint.SoapServer.SoapServerException' was thrown.' Task 'SharePoint' reported error (0x00000000) : 'Kontaktai - Kontaktai - Failed to copy one or more items because some are not compatible with SharePoint. The failed items were moved to your Local Failures folder and replaced with copies from the server. If you need assistance troubleshooting items in your Local Failures folder, a Help topic is available at the following address: http://go.microsoft.com/fwlink/?LinkId=70300. For details, see the log file C:\DOCUME~1\sauliusj\LOCALS~1\Temp\9-wss-sync-log.htm.'