New Outlook Global Address List: How It Works for Classic Outlook Users

The Global Address List in Outlook stores contact information for everyone in your organization. Classic Outlook users often rely on the GAL to find email addresses, phone numbers, and department details. The new Outlook for Windows changes how the GAL behaves and appears. This article explains the differences between the GAL in classic Outlook and the new Outlook. You will learn how to access the GAL in the new Outlook and how to work around its limitations.

How the Global Address List Works in Classic Outlook

The Global Address List is a directory service provided by Microsoft Exchange Server or Microsoft 365. It contains mail-enabled objects such as users, distribution groups, rooms, and equipment. Classic Outlook downloads a copy of the GAL to your local machine when you use Cached Exchange Mode. This local copy is called the Offline Address Book. Outlook refreshes the OAB periodically based on the send/receive schedule set in File > Options > Advanced > Send/Receive.

When you click the Address Book button in classic Outlook, you see a list of address books. The Global Address List appears at the top. You can browse by name, search by email address, or filter by department. Classic Outlook also shows the GAL in the To, Cc, and Bcc fields when you type a name and press Ctrl+K to check names against the directory.

The OAB allows you to resolve names even when you are offline or have a slow connection. The OAB file is stored in the Outlook folder under AppData. Its size depends on the number of users in your organization. For large organizations, the OAB can exceed 500 MB.

Classic Outlook GAL Features That New Outlook Changes

Classic Outlook lets you customize the OAB download schedule. You can also force an OAB download by clicking Send/Receive > Send/Receive Groups > Download Address Book. In the new Outlook, these manual controls do not exist. The new Outlook does not use the OAB at all. It queries the Exchange server directly every time you search the GAL.

How the Global Address List Works in the New Outlook

The new Outlook for Windows is a web-based client built on the same technology as Outlook on the web. It does not use Cached Exchange Mode in the same way as classic Outlook. Instead of downloading an OAB, the new Outlook sends a query to the Exchange server when you search for a name. This means you always get the most up-to-date information from the directory. But it also means you cannot browse the GAL when you are offline.

The Address Book button is still present in the new Outlook. You can find it in the Ribbon under the Home tab. Clicking Address Book opens the same GAL interface you see in classic Outlook. You can search by name, email, or department. The results appear in a list, and you can double-click a contact to view details.

The new Outlook also integrates the GAL into the compose window. When you type a name in the To field, a dropdown appears with matching contacts from your personal address book and the GAL. If the name does not appear, you can click Search Directory at the bottom of the dropdown. This sends a server-side query for the name.

Steps to Access the GAL in the New Outlook

1. Open the Address Book
   Click the Home tab in the Ribbon. Locate the Address Book button in the Find group. Click it. The Address Book dialog opens, showing the Global Address List by default.
2. Search for a name
   In the Address Book dialog, type a name in the Search box. Press Enter. Outlook queries the server and displays matching entries. You can also use wildcards by typing part of a name followed by an asterisk.
3. View contact details
   Double-click any entry in the search results. A contact card opens showing details such as job title, department, phone numbers, and manager name.
4. Add a GAL contact to your personal address book
   In the contact card, click Add to Contacts. This creates a copy in your default contacts folder. Changes to the original GAL entry will not update this copy.
5. Search the GAL from a compose window
   Open a new email message. Start typing a name in the To field. If the name does not appear in the dropdown, click Search Directory at the bottom. The GAL query runs and shows matching names.

What to Do When the GAL Does Not Work as Expected

The new Outlook GAL relies on a stable connection to the Exchange server. If you experience issues, the problem is often related to connectivity or permissions. Below are three common scenarios and their fixes.

GAL search returns no results in the new Outlook

This usually happens when Outlook cannot reach the Exchange server. Check your internet connection first. If you are connected, verify that Outlook shows Connected in the status bar at the bottom. If it shows Disconnected, click the status bar and select Work Offline to toggle it off. If the problem persists, restart Outlook. For persistent issues, your IT administrator may need to check your mailbox permissions.

GAL shows outdated information in the new Outlook

The new Outlook queries the server in real time, so outdated information is rare. If you see old data, the Exchange server itself may not have synced with the identity provider. This can happen after a user change in Active Directory or Microsoft Entra ID. Wait 15 to 30 minutes for replication. Then close and reopen Outlook to force a fresh query.

GAL is missing distribution groups in the new Outlook

The new Outlook shows only groups that are visible in the GAL. If a group is hidden from address lists, it will not appear in search results. You can still send email to a hidden group if you type its exact email address. To make a hidden group visible, ask your IT administrator to change the group’s visibility setting in the Exchange admin center.

Item	Classic Outlook	New Outlook
Offline Access	Yes, via Offline Address Book	No, requires server connection
Search Method	Local OAB plus server query	Server query only
Address Book Button	Home > Address Book	Home > Address Book
Search Directory in Compose	Ctrl+K checks names	Search Directory link in dropdown
Manual OAB Download	Yes, in Send/Receive Groups	Not available

You can now use the Global Address List in the new Outlook with confidence. The Address Book button works the same way it does in classic Outlook. For offline scenarios, consider creating personal contacts for frequently used GAL entries. The new Outlook does not support the Offline Address Book, so plan your workflow accordingly. If you need to browse the GAL without a network connection, keep classic Outlook installed until your organization completes the migration.