
104Microsoft Exchange 2000 Operations Guide — Version 1.0
(MMC)
A domain controller can be made into a global catalog (and vice versa) by selecting or deselecting a check box in the Active Directory Sites and Services MMC
Group
An object defined in Active Directory that contains members of other objects such as users, contacts, and possibly other groups. A group may be one of two types, either distribution or security depending on the requirement, and have a scope of either local, domain, or universal. This is similar to a distribution list in Exchange Server 5.5.
Hash Functions
A hash function provides a means of computing an electronic fingerprint, or checksum of a message. This electronic fingerprint is called the hash of a message.
Hashing secures messages and private key data by using them as elements in a mathemati- cal function that creates a checksum of the package. The algorithm is then used on the receiving end to decrypt the message. Hashes typically compute quickly, and are designed so that every imaginable message can have a unique hash. Hash algorithms include
Hosted organization (also known as virtual server, virtual machine, virtual organization)
A collection of Exchange services including, but not limited to virtual servers (that is, instances of IMAP4, SMTP, POP3, NNTP, HTTP, RVP), storage space, and
HTTP-DAV
See Distributed Authoring and Versioning.
Installable File System – IFS
See Web Storage System
Instant Messaging – IM
The Exchange 2000 service that allows for
Instant Messaging Presence Protocol – IMPP
The