i go into exchangme management console and created the mailbox. i created a security group and added appropriate members.
i selected the mailbox and managed send as permissions and full access permissions.
i am unable to open the mailbox with one of those users.
the error that pops up is
the set of folders cannot be opened. You do not have permission to login.
in outlook i go to tools -> options ->mail setup -> email accounts
i select my account
i select change
then it finds the mail box and adds it to my left pane.
i cant open the mailbox