How can Archive Manager report on which logins have access to other mailboxes?
Archive Manager does not report on this but you can use the following SQL query to display this information:
SELECT Login.LoginName, MailBox.Name
FROM Login INNER JOIN
LoginMailBox ON Login.LoginID = LoginMailBox.LoginID INNER JOIN
MailBox ON Login.LoginID = MailBox.OwnerLoginID AND LoginMailBox.MailBoxID = MailBox.MailBoxID where Login.LoginName <> MailBox.Name