Block Access to Distribution List

Please correct me if I am wrong, but I beleive that if both sites are sharing the same Organization - which means the same Global Address List. The answer would be NO it is not possible.

You can add delivery restrictions to distribution lists which would help control who can send out mass mailings, etc. But you can not prevent site B from seeing Site A if both sites exist in the same Organization.

Rick

Yes,,You are right..It's 1 organization..The other thing I tried doing was that I created a Distribution List and added all the members of Site B in it. Then I went to couple of my Corporate Distribution Lists that I want to Hide and put the Delivery restrictions for not accepting any messages from DLSite B. BUT it didn't work. I can specify a DL from SiteA and it works. I even tried a single mailbox from Site B but it will not restrict it. Any suggestions ??

The ideal thing to do given the circumstances is to create an NT group add users as appropriate, then create a distribution list in Exchange and add the NT group as the only group that should have access (permission) to the distribution list.

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