Set up G Suite for Outlook for your users

G Suite Sync for Microsoft Outlook

If you have the legacy free edition of G Suite, upgrade to G Suite Basic to get this feature. 

This page is for G Suite administrators who want to set up G Suite Sync for Microsoft® Outlook® (also known as GSSMO) for users in their organization. Before you begin, make sure you meet the system requirements and complete the setup and installation. Then, your users can start using GSSMO to synchronize their data between Outlook and G Suite.

I'm not an administrator

To begin using GSSMO, see the GSSMO User Help Center.

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System requirements

G Suite requirements

G Suite or G Suite for Education account.

Operating system and Outlook requirements

Important: Links to Microsoft's website are provided for your convenience. The links and their content can change without notice. Consult Microsoft's website for the latest configuration and support information.

Operating system requirements

Note: GSSMO isn't supported for Apple® Mac®. Microsoft Outlook for Mac doesn't support the Messaging Application Programming Interface (MAPI), which is required for GSSMO to communicate with Outlook.

Outlook requirements

Permissions for users

In order to install GSSMO, users must have local administrator permissions for their computers.

Port requirements

Open port 443 for the following applications on each computer:

  • Outlook.exe
  • ProfileEditor.exe

Set up and install

Set up GSSMO in the Google Admin console

Turn on the following features in your Admin console:

  1. Sign in to the Google Admin console.
  2. Turn on GSSMO for your account:
    1. From the dashboard, click Apps and then G Suite and then Gmail and then Advanced settings.
    2. In the G Suite Sync section, check the Enable G Suite Sync for Microsoft Outlook for my users box.
    3. Click Save.
  3. Turn on the Google Calendar service (so users can create profiles). See Turn Calendar on or off for users for details.
  4. To use Global Address List (GAL) Generator:
    1. From the dashboard, go to Security > API reference. Where is it?
    2. Check the Enable API Access box.
    3. Click Save.
  5. Turn on contact sharing (so users' Global Address Lists are dynamically updated):
    1. From the dashboard, click Apps and then G Suite and then Directory and then Sharing settings.
    2. Select Enable contact sharing.
    3. Click Save.
  6. Turn on the Drive service and Drive apps (required to synchronize notes to Drive):
    1. To turn on Drive, see Turn Drive on or off for users.
    2. To allow users to install Drive apps, click Apps and then G Suite and then Drive and Docs and then Features and applications.
    3. In the Drive SDK section, check the Allow users to access Google Drive with the Drive SDK API box.
    4. Click Save.
Install GSSMO

Each user who want to sync their data with Outlook must have GSSMO installed on their computer. You have 2 options for installation.

Option 1: Push an MSI file to your users

To do this, download the MSI file below. Be sure to pick the correct one, which is based on your users' version of Outlook.

Your users can refer to I'm installing GSSMO myself for further instructions.

Option 2: Let users download GSSMO themselves

Users can download GSSMO from the GSSMO download page. They can then follow these instructions to install the plugin.

(Optional) Set up free/busy information for Exchange users

If you're using GSSMO in a mixed G Suite and Exchange environment and you want to query availability information for Exchange users, you need to:

  1. Install and configure Google Calendar Connector Web Service. For instructions, see Google Calendar Connector Web Service Installation and Configuration Guide.

    Important: When you set up the web service, make sure you don't set up the Google Calendar Connector Sync Service.

  2. Create the following registry key and accompanying string value on each computer where GSSMO is installed. If you're running a 32-bit version of Outlook on a 64-bit version of Windows, create this registry key in the correct location for 32-bit applications. For details, see the instructions on using the Windows registry at Configure limits and options through the registry.
    • Registry key— HKEY_CURRENT_USER\Software\Google\Google Apps Sync\CalendarSync
    • String value—Value name: FreeBusyURL; Value data: <URL for the Calendar connector>

      Example (where you replace MY_COMPANY_FREEBUSY_SERVER with the name of your company's server)

Note: Google Support cannot assist with troubleshooting your Google Calendar Web Service setup.

Importing data with GSSMO

Integration with G Suite Migration for Microsoft Outlook

With GSSMO, your users can import data from an Exchange account or Outlook PST file. To do this, GSSMO uses a separate migration tool, G Suite Migration for Microsoft Outlook. GSSMO launches the migration tool automatically and, in most cases, users won't even notice they're using a separate tool.

GSSMO launches the migration tool when the user:

G Suite Migration for Microsoft Outlook as a standalone migration tool

Users can launch G Suite Migration for Microsoft Outlook as a standalone application by going to the Windows Start menu and clicking G Suite Migration for Microsoft Outlook.

However, this doesn't import Outlook notes, tasks, or journal entries. To import this data, users should run their migrations using GSSMO.

What's imported?

Users can import mail, contacts, calendar events, and Outlook notes, which are then available in Outlook and the G Suite web interface. They can also import Outlook tasks and journal entries, which remain available only in Outlook.

How do I install the migration tool?

The G Suite Migration for Microsoft Outlook tool must be installed on each user's computer.

Users who download GSSMO from the download page will install the migration tool automatically. If you push GSSMO to users via an MSI file, you need to push the migration tool to them as well. Or, have them install the migration tool themselves. For details, see Install G Suite Migration for Microsoft Outlook.

Get help

The Google Cloud Support Center can provide support for GSSMO, but not for Outlook or Windows. If you have additional Outlook or Windows questions, please contact Microsoft.

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