Hi there, Environemnt: SharePoint 2007, SQL Server 2005 In order to get into Intranet portal it is required to enter USERNAME, PASSWORD [WINDOWS AUTHENTICATION]. That has been working fine for few years. Now when the office document is opened it demands authentication, requiring the end user to enter username and pasword again. Can this be reverted? Once the credentials are entered first time to get into Intranet portal it should allow office documents to be opened without demanding authentication? To simplyfy I would like to avoid the second time authentication while opending office document from SharePoint portal. Help is appreciated. Thanks, RajuApriori algorithm [association rule]

to solve this problem, adding your site in the trust site zone.and here is good article describing 2 case. i believe you fit in case 1. http://www.asheville-computer-repair.com/index.php/2009/07/29/log-in-already/ hope this works thanks -wsSharePoint administrator, MCTS,MCITP