Glossary

---

A

A

Address record. A DNS resource record that maps a Fully Qualified Domain Name (FQDN) to an IP address.

ACE

Access Control Entry, or the basic unit of Windows 2000 security. ACEs control access to NTFS files and AD objects. They consist of a security principal (SID) and an access mask, which define the access rights for the SID.

ACL

Access Control List, a set of ACEs that defines the rights to a file or AD object.

AD

Active Directory, the directory service used by Windows and associated applications, such as Exchange 2000/2003.

ADC

The Active Directory Connector, the component that controls synchronization between the AD and the Exchange 5.5 DS. The ADC manages one or more connection agreements that define how and when the two directories synchronize objects.

Administration group

A collection of Exchange 2000 and Exchange 2003 servers that share common administration policies.

ADO

Application Data Objects or Active Data Objects. A programming layer built on top of OLE/DB that allows high-level programming languages such as Visual BASIC to access a data store via a common query language.

ADSI

Active Directory Services Interface, the API used to programmatically manipulate AD objects. The interface is supported by COM-compatible programming languages, such as Visual BASIC, Vbscript, and C++.

API

Application Programming Interface.

ASN.1

A method of encoding X.400 messages.

ASP

Application Service Provider. A company acting as a service provider that focuses on delivery of a specific application rather than just facilitating access to the Internet.

Attribute

A characteristic of an Active Directory object-for example, a user's password. Attributes are also referred to as "properties."

---