Article ID: 268754 - View products that this article applies to.
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This article explains how to assign mailbox permissions in Microsoft Exchange Server to users or to groups that are not the primary account that is associated with that mailbox.
Unlike Microsoft Exchange Server 5.5, Microsoft Exchange 2000 Server and Microsoft Exchange Server 2003 use the Microsoft Windows 2000 Active Directory Access Control Lists (ACLs) to assign security and permission information to Exchange mailboxes.
By default, only the user who is the mailbox owner has the required permissions to open his or her mailbox. This differs from Exchange Server 5.5, where the service account , by default, is granted access to all mailboxes.
Note The service account is the account that is selected during installation to start the Exchange Server services.
To grant access to an Exchange 2000 or an Exchange 2003 mailbox, follow these steps.
Note You must have the appropriate Exchange administrative permissions to do this.
(https://support.microsoft.com/kb/262054/ )How to get service account access to all mailboxes in Exchange 2000
Article ID: 268754 - Last Review: December 3, 2007 - Revision: 4.2