we have an exchange server 2003 installation with outlook 2007 clients. on the server there is a public folder for contacts that has "Editor" permission defined for a particular active directory security group. however, there are a few clients who are members of that particular security group who are not able to edit some contacts in this folder. other members of this security group can edit any contact in the folder.i created a custom view for this folder and addedthe "From" field. it turns out that the "From" field is blank for the contacts that some clients are not able to edit. i can't edit this "From" field so i'm not sure how to correct this issue.any help is appreciated. thanks.Tony

Hi, Please try to use the method in article below to enumerate enumerating the security groups that a normal user/ problematic user is a member of. How to enumerate a user's security group membership using Visual Basic or Visual Basic Script http://support.microsoft.com/default.aspx/kb/301916 After that,please try to compare the sevurity settings on those groups. Regards, Xiu