{"id":74236,"date":"2026-10-07T08:25:36","date_gmt":"2026-10-07T15:25:36","guid":{"rendered":"https:\/\/cirasync.com\/?p=74236"},"modified":"2026-10-07T08:25:36","modified_gmt":"2026-10-07T15:25:36","slug":"gal-sync-guide","status":"publish","type":"post","link":"https:\/\/cirasync.com\/fr\/blog-articles\/gal-sync-guide\/","title":{"rendered":"GAL Sync The Complete Guide to Syncing the Global Address List to Smartphones (2026)\u00a0"},"content":{"rendered":"

Your Microsoft 365 Global Address List may contain the phone numbers, email addresses, job titles, and other directory information employees need every day. The problem is that having someone in the GAL does not automatically make that person a saved contact in an employee’s smartphone address book.<\/span>\u00a0<\/span><\/p>\n

That distinction is the foundation of GAL sync.<\/span>\u00a0<\/span><\/p>\n

Microsoft Exchange Online provides the Global Address List as an organizational address list. Microsoft states that the default GAL includes the mail-enabled recipient objects in the organization, and Exchange address lists are dynamically updated as recipients are created or modified.<\/span>\u00a0<\/span><\/p>\n

But the GAL and a user’s personal Contacts folder are not the same thing.<\/span>\u00a0<\/span><\/p>\n

A user may be able to search for a colleague through Outlook or an Exchange directory without that colleague existing as a saved contact on the phone. That difference becomes important when organizations need native caller ID, contact lookup outside Outlook, text-message name resolution, or centrally maintained company contacts on hundreds or thousands of smartphones.<\/span>\u00a0<\/span><\/p>\n

This guide explains exactly how GAL sync works in Microsoft 365, what Microsoft supports natively, how iPhone and Android behave differently, where Intune fits into the process, and how organizations can automate GAL synchronization with CiraSync<\/a>.<\/p>\n

<\/span>TL;DR:<\/span><\/h2>\n

Being listed in your Microsoft 365 Global Address List does not make someone a saved contact on an employee’s phone. The GAL is an organizational directory you can search; a phone’s Contacts app is a separate store that powers caller ID, messaging, and native apps. CiraSync bridges the two in one of two ways: the mailbox path, where GAL records land in each user’s mailbox Contacts and the device’s contact sync carries them to the phone; or Mobile Direct, which pushes corporate contacts straight into the native iOS or Android Contacts app over CardDAV, typically through the organization’s device-management platform. Directory lookup alone (Outlook address book, Apple’s Exchange GAL search) does not create native contacts, and Intune governs mobile app behavior rather than converting the GAL into contacts. For centrally managed, one-way distribution of company contacts to hundreds or thousands of phones, an automated GAL-to-mailbox sync such as CiraSync handles the first step so the device can handle the second.<\/span>\u00a0<\/span><\/p>\n

<\/span>What Is GAL Sync?<\/span>\u00a0<\/span><\/span><\/h2>\n

GAL sync is the process of making directory information from an organization’s Global Address List available as usable contact records in another destination, such as Outlook Contacts, an Exchange mailbox contact folder, an iPhone, or an Android address book.<\/span>\u00a0<\/span><\/p>\n

In Exchange Online, the GAL is an address list used to find recipients. Microsoft describes the default Global Address List as the primary repository of recipients in an Exchange Online organization. It can contain users, contacts, groups, dynamic distribution groups, and other mail-enabled objects.<\/span>\u00a0<\/span><\/p>\n

That is different from a user’s personal Microsoft 365 Contacts folder.<\/span>\u00a0<\/span><\/p>\n

This distinction explains why an employee might be able to search for \u00ab\u00a0John Smith\u00a0\u00bb when composing an email but still see only John’s telephone number rather than his name when John calls their smartphone.<\/span>\u00a0<\/span><\/p>\n

For native caller identification, the relevant information normally needs to be available to the phone’s contact system rather than merely searchable in the Exchange directory.<\/span>\u00a0<\/span><\/p>\n

<\/span>GAL vs. Outlook Contacts vs. Smartphone Contacts<\/span>\u00a0<\/span><\/span><\/h2>\n

Understanding the architecture prevents most GAL sync confusion.<\/span>\u00a0<\/span><\/p>\n\n\n\n\n\n\n
Data Source<\/span><\/b>\u00a0<\/span><\/td>\nWhat It Is<\/span><\/b>\u00a0<\/span><\/td>\nPrimary Purpose<\/span><\/b>\u00a0<\/span><\/td>\nAutomatically a Native Phone Contact?<\/span><\/b>\u00a0<\/span><\/td>\n<\/tr>\n
Global Address List<\/span>\u00a0<\/span><\/td>\nExchange organizational directory<\/span>\u00a0<\/span><\/td>\nFinding people and mail-enabled recipients<\/span>\u00a0<\/span><\/td>\nNo<\/span>\u00a0<\/span><\/td>\n<\/tr>\n
Outlook or Microsoft 365 Contacts<\/span>\u00a0<\/span><\/td>\nContacts stored in a user’s mailbox<\/span>\u00a0<\/span><\/td>\nPersonal or synchronized contact management<\/span>\u00a0<\/span><\/td>\nCan be, when contact synchronization is enabled<\/span>\u00a0<\/span><\/td>\n<\/tr>\n
iPhone or Android Contacts<\/span>\u00a0<\/span><\/td>\nContacts available to the phone operating system<\/span>\u00a0<\/span><\/td>\nCaller ID, phone, messaging and native apps<\/span>\u00a0<\/span><\/td>\nYes<\/span>\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Microsoft documents Outlook mobile’s <\/span>Save Contacts<\/span><\/b> and <\/span>Sync Contacts<\/span><\/b> functions for exporting or synchronizing Outlook contacts with the device’s native contacts application. Microsoft does not describe this feature as copying the entire Exchange GAL into the user’s contact folder.<\/span>\u00a0<\/span><\/p>\n

That is why simply enabling contact synchronization in Outlook does not solve every GAL-to-smartphone requirement.<\/span>\u00a0<\/span><\/p>\n

<\/span>Why Doesn’t the Global Address List Automatically Sync to Smartphones?<\/span>\u00a0<\/span><\/span><\/h2>\n

The GAL is designed primarily as an organizational directory rather than a personal contact folder.<\/span>\u00a0<\/span><\/p>\n

Desktop Outlook illustrates the difference clearly. When a Microsoft 365 or Exchange user opens the address book or selects the To field while composing a message, Outlook can use the organization’s Global Address List to find recipients.<\/span>\u00a0<\/span><\/p>\n

Smartphones can also perform directory lookups in some configurations.<\/span>\u00a0<\/span><\/p>\n

Apple, for example, documents that iPhones and iPads connected to Exchange can retrieve information from an Exchange Online GAL when users search Contacts or enter email recipients.<\/span>\u00a0<\/span><\/p>\n

But <\/span>directory lookup is not the same as synchronization<\/span><\/b>.<\/span>\u00a0<\/span><\/p>\n

A lookup retrieves information when it is requested. GAL synchronization creates or maintains contact records in a destination where the operating system and other applications can use them directly.<\/span>\u00a0<\/span><\/p>\n

This matters for organizations that require:<\/span>\u00a0<\/span><\/p>\n