Mike, You need to create multiple address list views, and assign permissions to them so that only intended people can view each address list. You should also restrict the permissions on the default address book views so that all users cannot view them. Regards, Raj -----Original Message----- From: A. Michael Salim [mailto:msalim@xxxxxxxxxxxx] Sent: Wednesday, January 28, 2004 6:18 PM To: [ExchangeList] Subject: [exchangelist] isolating users in an ISP environment http://www.MSExchange.org/ Greetings: I have an Exchange 2003 server on a Win2003 server. It is in an "ASP" environment with many different internet domain names, each one being a totally separate company. It is important that one company does not see anything or is aware of anything about another company. I have followed all the ASP guidelines afaik. Most everything seems to be working, but when, as an Outlook 2003 client, if I do the following, I can see all the other groups, users and contacts. Any ideas on what I might have missed in isolating each company? Click on "Calendar" Click on "Open a Shared Calendar" (it is a link under "My Calendars") A popup will appear. Click in the "Name..." button A "Select Name" popup will appear. In this popup, there is a pull-down menu for "Show Names from the...". If I choose any of the pull-down items like "All Contacts", "All users", "All Groups", then sure enough I can see all the other companies, their users etc.! How do I isolate these from one another so users in one company ("Group") cannot see anyone except their own groups, members and contacts? best regards Mike ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------