IETF (Internet Engineering Task Force)An open community of network designers, operators, vendors, and researchers concerned with the evolution of Internet architecture and the smooth operation…
IIS (Internet Information Services)The Microsoft Web service for publishing information on an intranet or the Internet, and for building server-based Web applications.
IM (Instant Messaging)The Exchange 2000 service that allows for real-time messaging and collaboration between users.
impersonationThe ability of a thread to run in the security context of a security principal different from the security principal that started the process.
In-Country/Region Number FormatThe string that is used to define how to create an in-country/region number to use when making calls from a dial plan. [Exchange 2007]
in-place upgradeIn Exchange Server documentation, this is the scenario in which you upgrade to a newer version of Microsoft Exchange software on a single computer.
inbound hostThe host computer that provides a newsfeed. [Exchange 5.5]
inbound recipient filteringA recipient filter that reduces unsolicited e-mail by filtering inbound information based on the recipient, and applicable only to e-mail messages sent by…
InetOrgPersonAn Active Directory object that is similar to the Windows user object, but has extended attributes to improve compatibility with directory services that…
information serviceA tool that enables Exchange and foreign systems to exchange mail. [Exchange 5.5]
information storeAn Exchange core component that stores users' mailboxes and folders. See also public information store, private information store. [Exchange 5.5]
Information Store ViewerA tool that shows the properties available for each message, how you can use them, and in what format they appear.
informational announcementAn audio message that is played when a user first dials in to a Unified Messaging system that describes some temporary condition of interest to all users.
Intelligent Message FilterThe underlying technology of the Exchange Server content filter that evaluates inbound mail and assesses the probability that an inbound e-mail message is…
International Access CodeThe prefix that is used to direct a call internationally. The International Access Code is 011 in the United States and 00 in much of the rest of the…
International Number FormatThe string that is used to define how to dial someone from outside of their country/region. [Exchange 2007]
InternetA worldwide network of networks that all use the TCP/IP communications protocol and share a common address space.
Internet e-mail addressConsists of a user name and a domain name, with the two separated by an at (@) sign, such as username@company.com. [Exchange 5.5]
Internet Key ExchangeA protocol that establishes the security association and shared keys necessary for two parties to communicate with Internet Protocol security (IPSec).
Internet Mail ServiceAn Exchange component that enables users to exchange messages with Internet users.
Internet News ServiceEnables Microsoft Outlook users and users of third-party Network News Transfer Protocol (NNTP) applications to participate in USENET newsgroup discussions.
InteroperabilityThe ability of systems, units, or forces to provide services to or accept services from other systems, units, or forces and to use the services so…
intranetA private network that uses Internet-related technologies to provide services within an organization.
IP address/TCP port combinationA combination of attributes that uniquely identifies Simple Mail Transfer Protocol (SMTP), Network News Transfer Protocol (NNTP), Internet Message Access…
IP Allow listA filtering list that is used by the Connection Filter agent in Exchange Server 2007.
IP Block listA filtering list that is used by the Connection Filter agent in Exchange Server 2007. IP addresses on the IP Block list are considered spam.
IP gatewayA third-party hardware device or product that connects a legacy PBX to a LAN. An IP gateway translates or converts TDM or telephony circuit-switched…
IWA (Integrated Windows Authentication)An authentication method in which the user name and password, also called credentials, are hashed before they are sent over the network.