outlook 2002 add mailbox problem

I need to add a users inbox into another users outlook. We are running exchange 2002.

I go to 'toos', then 'email accounts' then 'view or change existing accounts' then 'change' then 'more settings' and finally get the window to pop up that has then advanced tab. In the advanced tab I add a user.

Now, when I open that outlook app, I can see the inbox added. But when I go to open the inbox, I get an error message. This is the message:
"Unable to expand the folder. The set of folders could not be opened. The operation failed."

Now there is one users outlook that has one others users mailbox added to it, and it is working. And when I test by adding some peoples inbox to my own outlook, it works. The problem then is that for a few of the users I cannot get it to work.

For example: I cannot add user2, user3, user4, etc. to my outlook or anyone elses? But user5, user6, and user7 can be added.

I cannot see anything in the members list on security in active directory for these users to account for why some will work and others will not?

Anyone have any ideas?

I can add some, others I cannot add. And to further complicate this, there is some I can add for some users, but when I try to add that person to a different user it will not allow the folder to open?

Is this all a mess in the Active Directory, and the permissions?
troyhicksAsked:
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sunray_2003Commented:
Not sure where exactly the issue can be but I guess it has to do with permissions.

here is a similar scenario.. try to see if the suggestions about permissions would work for u
http://www.experts-exchange.com/Applications/MS_Office/Outlook/Q_20878983.html

SR
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