OAB (offline address book)A copy of an address book that has been downloaded so that an Outlook user can access the information it contains while disconnected from the server.
OAB (offline address book) generationThe process by which Exchange Server creates and updates the OAB. Administrators can define when the OAB generation process will run. [Exchange 2007]
OAB (offline address book) version 4The OAB version that was introduced with Exchange Server 2003 Service Pack 2 (SP2). OAB version 4.0 is required for Web-based distribution. [Exchange 2007]
OABGenWhen the Microsoft Exchange System Attendant generates the offline address book (OAB), it calls Oabgen.dll (referred to as OABGen).
open proxyA proxy server that accepts connection requests from anyone anywhere and forwards the traffic as if it has originated from the local hosts. [Exchange 2007]
outdialingA process in which Unified Messaging (UM) dials or transfers calls. Unified Messaging generally receives calls, but sometimes dials calls.
Outlook AnywhereA feature that makes it possible for a user to access their Exchange Server mailbox from any workstation using the full Outlook client, regardless of the…
Outlook E-Mail PostmarkA computational proof that Outlook applies to outgoing messages to help recipient messaging systems distinguish legitimate e-mail from junk e-mail.
Outlook Voice AccessA feature that allows a Unified Messaging-enabled user to access their Microsoft Exchange Server mailbox over the telephone.
Outlook Web Access LightA lightweight version of Outlook Web Access optimized for accessibility and compatibility with the widest array of browsers and operating systems.
Outlook Web Access Web PartA piece of the user interface (UI) in Outlook Web Access that can be hosted in iframes as part of other Web applications such as SharePoint Portal Server…
Outside Line Access CodeThe prefix that is used to access an outside line. This prefix is typically 9. [Exchange 2007]