Configure options through the registry

You can configure some G Suite Sync for Microsoft® Outlook® (GSSMO) features by modifying the Microsoft® Windows® registry. You can make updates on individual computers or on multiple computers at once. Users can do this themselves if they're comfortable working in the registry. Otherwise, you or another administrator should make the changes.

If you need to update multiple computers at once, use the Group Policy Management Editor. For details on using Group Policy to update multiple computers, see Registry Extension.

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Using the Windows registry

How do I modify the registry?

When you modify the registry, you get a key, a value name (DWORD value or String value), and value data. You must open the registry, create or locate the key, create a value for the key, and then modify the value with data.

Note: If you're using a 32-bit version of Outlook on a 64-bit version of Windows, the process is a little different. For details, see Using a 32-bit version of Outlook on a 64-bit version of Windows.

Step 1: Open the registry

  1. From the Windows Start menu, click Run.
  2. In the Run box, enter regedit.

Step 2: Create or locate a key

To create a key:

  1. Go to the folder where you're instructed to create the key.
  2. Click Edit and then New and then Key to create a new folder.
  3. Enter the key's name as given in your instructions and press Enter.

To locate an existing key:

Using the path given in your instructions, go to the key using the folders on the left of the registry. The path begins with HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER.

Step 3: Add a new value to a key

  1. Select the key's folder.
  2. Click Edit and then New and then DWORD Value (to add a DWORD value) or String Value (to add a String value).
  3. Enter the value's name from the instructions and press Enter.

Step 4: Modify value data

  1. Right-click the new value's folder and click Modify.
  2. In the Value data box, enter the value from your instructions and click OK
Using a 32-bit version of Outlook on a 64-bit version of Windows

If you're running a 32-bit version of Outlook on a 64-bit version of Windows, make all your GSSMO registry settings in the correct location for 32-bit applications. There are 2 ways to do this:

Option 1

In the Run box, enter %systemroot%\syswow64\regedit (instead of regedit) to open the 32-bit version of the registry. Then, modify the keys using the instructions for each setting.

Option 2

Open the regular registry by entering regedit in the Run box. Then, go to each registry key in its Wow6432Node location for 32-bit applications. For example, instead of navigating to HKEY_CURRENT_USER\Software\Google\Google Apps Sync, go to HKEY_CURRENT_USER\Software\Wow6432Node\Google\Google Apps Sync. Then, modify the keys using the instructions for each setting.

Registry settings for GSSMO

Hide the synchronization status for new profiles

You can prevent the synchronization status from showing when a new GSSMO user first starts GSSMO:

  1. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Other registry key.
  2. Add the DefaultSyncStatusVisibility DWORD value to the registry key.
  3. In the Value data box, enter 0 to hide the sync status at initial sign-in.
  4. (Optional) To show the sync status at initial sign-in, enter 1.
Customize sign-in options for users

You can turn on single sign-on (SSO) and determine whether credentials are saved:

  1. Add the HKEY_LOCAL_MACHINE\Software\Google\Google Apps Sync\SignIn registry key.
  2. Add the SSOEnabled DWORD value to the registry key.
  3. In the Value data box, enter 1 to enable SSO sign-on. 
  4. (Optional) To allow users to save their credentials, add the SaveCredentialsAllowed DWORD and in the Value data box, enter 1.
  5. (Optional) To disable SSO or the saving of credentials, follow the steps above and enter 0 in the Value data box.

To enable password log in, follow the steps above but add the PasswordEnabled DWORD to the registry key. Then, in the Value data box, enter 1.

Disable sync for a specific product

Important: These options are experimental and are not fully supported.

If you're experiencing issues with a product, you can disable the sync of that product:

  1. Add the SyncFlagsEnabled DWORD value to modify the HKEY_CURRENT_USER\Software\Google\Google Apps Sync registry key. 
  2. In the Value data box, enter 1, select Hexadecimal, and click OK.
  3. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\product registry key.
  4. For product, substitute one of the following values for the product that you want to disable:
    • For Google Calendar, use CalendarSync.
    • For Google Contacts, use ContactsSync.
    • For Directory (shared contacts), use AddressBookSync.
    • For Gmail, use EmailSync.
    • For Notes, use NotesSync.
    • For Tasks, use TasksSync.
  5. Add the DownloadEnabled DWORD value to the registry key.
  6. In the Value data box, enter 0, select Hexadecimal, and click OK.
  7. Click OK
  8. Add the UploadEnabled DWORD value to the registry key.
  9. In the Value data box, enter 0, select Hexadecimal, and click OK.
Disable the Global Address List

If you don't want users to have access to your organization's Global Address Listin G Suite, you can disable this feature. Learn more about the Global Address List.

To disable the Global Address List for everyone in your organization, see Disable contact sharing for your organization.

To disable it for an individual user:

  1. On the user's computer, add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\AddressBookSync registry key.
  2. Add the DynamicGal DWORD value to the registry key.
  3. In the Value data box, enter 0 to disable the Global Address List.
Enable or disable import options

You can turn import options on or off in the GSSMO interface.

Step 1: Add the SyncFlagsEnabled DWORD value

  1. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync registry key.
  2. Add the SyncFlagsEnabled DWORD value to the registry key.
  3. In the Value data box, enter 1 to turn import options on and off with registry keys.
  4. (Optional) To prevent import options from being turned on and off with registry keys, follow the steps above and enter 0 in the Value data box.

Step 2: Turn import options on or off

You can turn all import options on or off. Or, you can individually turn the Calendar, Email, Contacts, Tasks, and Other import options on or off.

To turn all import options on or off:

  1. Add the ImportEnabled DWORD value to modify the HKEY_CURRENT_USER\Software\Google\Google Apps Sync registry key.
  2. In the Value data box, enter 1 to enable all import options.
  3. (Optional) To disable all import options, follow the steps above and enter 0 in the Value data box.
  4. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Migration registry key.
  5. Add the ImportEnabled DWORD value to the registry key. 
  6. In the Value data box, enter 1 to enable all import options.
  7. (Optional) To disable all import options, follow the steps above and enter 0 in the Value data box.

To turn individual options on or off:

  1. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\import-option registry key.
  2. For import-option, substitute one of the following values for the option that you want to turn on or off:
    • For Calendar, use CalendarSync.
    • For Email, use EmailSync.
    • For Contacts, use ContactsSync.
    • For Tasks, use TasksSync.
    • For Other, use Other.
  3. Add the ImportEnabled DWORD value to the registry key.
  4. In the Value data box, enter 1 to turn on the import option.
  5. (Optional) To turn off the import option, follow the steps above and enter 0 in the Value data box.
Limit mailbox size

You can limit the size of a user's mailbox to a specified number of megabytes. The value also includes the size of delegated mailboxes that can be accessed. 

  1. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\EmailSync registry key.
  2. Add the MaxStorePstSizeMegaBytes DWORD value to the registry key to set the value to a decimal value.
  3. In the Value data box, enter the number of megabytes that you want as the maximum size of the mailbox.
Set paths to PST and log files

You can specify the locations of local PST and log files. The new locations apply to:

  • PST files associated with profiles created after you modify the registry key.
  • Log files created after you modify the registry key.

To set the paths to PST and log files:

  1. On each computer where GSSMO is installed, go to HKEY_CURRENT_USER\Software\Google\Google Apps Sync.
  2. (Optional) To set the path for PST folders, add the PstFolder string value name. Then, in the String Value box, add the path to the PST file on the local computer (for example, C:\Program Files\Google\Google Apps Sync\PST).
  3. (Optional) To set the path for log files, add the LogFolder string value name. Then, in the String Value box, add the path to the log files on the local computer (for example, C:\Program Files\Google\Google Apps Sync\Logs).
Set logging levels

To enable different logging levels (Information, Verbose, or Performance) for GSSMO, edit the tracing registry key and its accompanying level DWORD value.

Note: Verbose logging can generate large log files, which can impact performance and the availability of disk space.

  1. Add the HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Tracing registry key.
  2. Add the Level DWORD value to the registry key. 
  3. In the Value data box, choose an option to modify the DWORD:
    • To enable performance level logging, enter 4f in the Value data box. 
    • To enable verbose level logging, enter ff in the Value data box.
    • To enable information level logging, enter f in the Value data box.

Logging levels for GSMMO

If you are using G Suite Migration for Microsoft Outlook (GSMMO), you might need to enable different logging levels. Follow these instructions to change the logging levels for the migration tool:

  1. Add HKEY_CURRENT_USER\Software\Google\Google Apps Migration\Tracing registry key.
  2. Add the Level DWORD value to the registry key.
  3. In the Value data box, choose an option to modify the DWORD:
    • To enable performance level logging, enter 4f
    • To enable verbose level logging, enter ff.
    • To enable information level logging, enter f.

Learn more about GSMMO

Enable support for incoming messages with UTF-8 headers

By default, support for UTF-8 headers for incoming messages is not turned on. You might want to enable support if you receive messages where the sender, recipient, or subject appear distorted.

If you use Outlook 2016...

First, enable compatibility with RFC 6530 by using the CCSF_GLOBAL_MESSAGE flag to sync incoming messages to Outlook. Then, when it's not specified in the message, have GSSMO set the message's MIME charset to UTF-8. 

  1. Go to the HKEY_CURRENT_USER\Software\Google\Google Apps Sync registry key.
  2. Add the UseGlobalMessageFlag DWORD value to the registry key.
  3. In the Value data box, enter 1 to enable the CCSF_GLOBAL_MESSAGE flag.
  4. Add the SetMIMECharsetToUTF8 DWORD value to the registry key.
  5. In the Value data box, enter to set the MIME charset to UTF-8.

If you use Outlook 2013 or earlier...

Outlook 2013 and earlier versions don't support RFC 6530. Instead, enable GSSMO to make messages compatible with RFC 2047 by re-encoding some UTF-8 headers with encoded words. 

  1. Go to the HKEY_CURRENT_USER\Software\Google\Google Apps Sync registry key.
  2. Add the FixUTF8HeadersEnabled DWORD value to the registry key.
  3. In the Value data box, enter to enable re-encoding of UTF-8 headers.
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