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IFS

See Installable File System (IFS).

IMAP4

See Internet Message Access Protocol version 4 (IMAP4).

Information Store

The Microsoft Exchange Server 2003 service that is responsible for managing the storage groups, and mailbox and public store databases. If the Information Store service is not running, databases cannot be mounted for use.

Installable File System (IFS)

A Microsoft Windows Server 2003/Exchange Server 2003 storage technology that makes mailboxes and public folders accessible through the file system.

Integrated Windows Authentication

Internet Information Services (IIS) authentication in which the password is encrypted for security. This form of authentication does not work through firewalls and proxies.

Internet Message Access Protocol version 4 (IMAP4)

An Internet messaging protocol that enables a client to access mail on a server rather than downloading it to the computer. IMAP4 is designed for environments where users log on to the server from a number of different workstations, or log in remotely from outside of a firewall without a virtual private network (VPN) connection.

Internet protocol virtual server

Microsoft Exchange Server 2003 uses virtual servers to handle e-mail messages that use the various Internet protocols. Exchange Server 2003 uses Hypertext Transfer Protocol (HTTP), Simple Mail Transfer Protocol (SMTP), Network News Transfer Protocol (NNTP), Internet Message Access Protocol 4 (IMAP4), and Post Office Protocol version 3 (POP3) virtual servers.

isinteg utility

A command-line utility that tests and repairs the integrity of a Microsoft Exchange information store.