How may i stop sharepoint to ask for credentials each time i open outlook with attached sharepoint lists?

It sounds like the attached SharePoint lists are on sites that are NOT configured to be in the LOCAL INTRANET security zone of your browser. Navigate to these lists and ensure their security zone is set to Local Intranet and the security prompt should disappear. I trust that answers your question... Thanks C http://www.cjvandyk.com/blog