Resource mailbox

A mailbox that is associated with a resource instead of a user (such as a conference room for reservation purposes). In Exchange 5.5 one user (Windows security principal) may have had several mailbox accounts associated with it - such as a receptionist with a personal mailbox and a conference room mailbox associated. In Exchange 2000, there must be a one-to-one correspondence between a Windows 2000 security principal and a mailbox. Consequently, Exchange 5.5 resource mailboxes must have a Windows 2000 security principal (usually with no logon rights) associated with it, and a resource mailbox owner (with their own personal mailbox) is given delegated access to the resource mailbox. [Exchange 2000]

A resource mailbox is a mailbox that represents conference rooms and company equipment. Resource mailboxes can be included as resources in meeting requests, providing a simple and efficient way to utilize resources for an organization. The user account that is associated with a resource mailbox is disabled. [Exchange 2007]