Hi there ,as i understand sitecollection security ,member of a given sitecollection can not view another site collection where he has no membership ,my problem is that any user from a given site collection can view other site collection easily ,how is that ? by the way ,this user is not an administrator ,he is a domain user ,with approvers policy in his sitecollection

Hi, have you checked your IIS setting if it is set to ANONYMOUS, especially if the pages open without prompting them for credentials.You've only got one life; help as many people as you can, and enjoy it while it lasts.

Hi, I dont know but it looks to me that this domain user may be a member of one of the sharepoint security groups of both the site collections. Can you please check the security groups of both site collections to see if this user is part of any of them. Regards,Manvir

1. Check the IIS security settings. If it is Anonymm, chage it accordingly 2. Go to All people of the sitecollection and and check if users is present? 3. Check the user in the groups Hope these tips will help you..Senthilrajan Kaliyaperumal

i figured it out ,our previous sharepoint admin added authenticated user group to every sharepoint site collection ,which allowed any authenticated user to view any site collection thanks for help