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Address Books in Exchange Online

Exchange Online
 

Topic Last Modified: 2014-03-26

Recipients (which include users, resources, contacts, and groups) are any mail-enabled object to which Microsoft Exchange can deliver or route messages. For a recipient to send or receive email messages, the recipient must have an email address. Address books are the method by which users find each other in order to send email. There are many different methods for organizing address books. See Key terminology for detailed descriptions of address book features in Exchange Online.

By default, the Address List role isn’t assigned to any role groups. To use any cmdltes that require the Address List role, you need to add the role to a role group. For details, see the “Add a role to a role assignment policy” section of Manage Role Assignment Policies.

The following terms define the core components associated with email addresses and address books in Exchange Online.

address book policies

Address book policies (ABPs) allow you to segment users into specific groups to provide customized views of your organization’s global address list (GAL). When creating an ABP, you assign a GAL, an offline address book (OAB), a room list, and one or more address lists to the policy. You can then assign the ABP to mailbox users, providing them with access to a customized GAL in Outlook and Outlook Web App. The goal is to provide a simpler mechanism to accomplish GAL segmentation for on-premises organizations that require multiple GALs.

address lists

An address list is a subset of a GAL. Each address list is a collection of one or more types of mail-enabled recipients (for example, users, contacts, groups, public folders, conferencing, and other resources). You can use address lists to organize recipients and resources, making it easier for users to find the recipients and resources they need. Address lists are updated dynamically. Therefore, when new recipients are added to your organization, they're automatically added to the appropriate address lists.

offline address books

An offline address book (OAB) is a copy of a collection of address lists that has been downloaded so that a Microsoft Outlook user can access the information it contains while disconnected from the server.

hierarchical address books

The hierarchical address book (HAB) enables end users to look for recipients in their address book using an organizational hierarchy, such as seniority or management structure. Normally, users are limited to the default GAL and its associated recipient properties and the structure of the GAL often doesn't accurately reflect the management or seniority relationships for recipients in your organization. Being able to customize an HAB that maps to your organization's unique business structure provides your users with an efficient method for locating internal recipients.

 
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