Configure options through the registry

You can configure some G Suite Sync for Microsoft® Outlook® (GSSMO) features by modifying the 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.

Using the Windows registry

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How do I modify the registry?

When you modify the registry, you're given 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, 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.

Open the registry

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

Locate a key

Navigate to the key via the folders at the left of the registry, following the path given in your instructions. The path begins with HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER.

Create a key

  1. Navigate to the folder where you're instructed to create the key.
  2. Click Edit and then New and then Key. This creates a new folder in the folder you navigated to.
  3. Type the key's name as given in your instructions, and press enter.

Add a new value to a key

  1. Select the key's folder.
  2. Choose 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 as given in your instructions and press enter.

Modify value data

  1. Right-click the new value's folder and click Modify.
  2. Under Value Data, enter the value as given in your instructions.
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:

  1. When opening the registry, enter %systemroot%\syswow64\regedit (instead of regedit) in the Run dialog. This opens the 32-bit version of the registry. Then, modify the keys as described in the instructions given for each setting.
  2. Open the regular registry by entering regedit in the Run dialog. Then, navigate 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, navigate to HKEY_CURRENT_USER\Software\Wow6432Node\Google\Google Apps Sync.

Registry settings for GSSMO

Hide the synchronization status dialog for new profiles

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

  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Other
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Other by adding the following DWORD values:
    • DWORD value—DefaultSyncStatusVisibility
    • Modify the DWORD value as follows:
      • To show the dialog at initial log in—Value data=1
      • To hide the dialog at initial log in—Value data=0
Enable or disable SSO log in

You can enable or disable SSO log in and whether credentials are saved:

  1. Add the following registry key—HKEY_LOCAL_MACHINE\Software\Google\Google Apps Sync\SignIn
  2. Modify HKEY_LOCAL_MACHINE\Software\Google\Google Apps Sync\SignIn by adding the following DWORD values:
    • DWORD value—SSOEnabled
      Modify the DWORD value as follows:
      • To enable SSO login—Value data=1
      • To disable SSO login—Value data=0
    • DWORD value—PasswordEnabled
      Modify the DWORD value as follows:
      • To enable the password login—Value data=1
      • To disable the password login—Value data=0
    • DWORD value—SaveCredentialsAllowed
      Modify the DWORD value as follows:
      • To enable saving credentials—Value data=1
      • To disable saving credentials—Value data=0
Disable sync for a specific product

Important: These options are experimental and aren't fully supported.

If you're experiencing issues with a product, you can disable the sync of that product. Products that can be disabled are: 

  • Google Calendar—Use CalendarSync
  • Contacts—Use ContactsSync
  • G Suite Directory (shared contacts)—Use AddressBookSync
  • Gmail—Use EmailSync
  • Notes—Use NotesSync
  • Tasks—Use TasksSync
To disable sync for a product:
  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\product  (where product can be any of the products listed above). 
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\product by adding the following DWORD value:
    • DWORD value—DownloadEnabled
      Modify the DWORD value as follows:
      • To disable data download—Value data=0
Disable the Global Address List

If you don't want users to have access to your organization's Global Address List in G Suite, you can disable this feature. You can disable it for everyone in your domain using your Google Admin console. Or, you can disable it for individual users by adding a registry key on each person's computer.

  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\AddressBookSync
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\AddressBookSync by adding the following DWORD value:
    • DWORD value—DynamicGal
      Modify the DWORD value as follows:
      • To disable the dynamic Global Address List—Value data=0
Enable or disable import options

You can enable or disable import options in the GSSMO interface. The first step is to turn on import options using the registry keys. Then, you can turn on all import options or turn on individual import options.

Step 1: Turn import options on and off with registry keys

  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync by adding the following DWORD value:
    • DWORD value—SyncFlagsEnabled
      Modify the DWORD value as follows:
      • To turn import options on and off with registry keys—Value data=1
      • To prevent import options from being turned on and off with registry keys—Value data=0

Step 2 (Option 1): Turn all import options on or off

To turn all import options on or off, you need to add a DWORD value to an existing key, and then create a new key and add a DWORD value.

  1. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync by adding the following DWORD value:
    • DWORD value—ImportEnabled
      Modify the DWORD value as follows:
      • To enable all import options—Value data=1
      • To disable all import options—Value data=0
  2. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Migration
  3. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Migration by adding the following DWORD value:
    • DWORD value—ImportEnabled
      Modify the DWORD value as follows:
      • To enable all import options—Value data=1
      • To disable all import options—Value data=0

Step 2 (Option 2): Turn individual options on or off

You can turn individual import options on or off. Import options that can be turned on or off are: 

  • Calendar—Use CalendarSync
  • Email—Use EmailSync
  • Contacts—Use ContactsSync
  • Tasks—Use TasksSync
  • Other—Use Other

To turn an import option on or off:

  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\import-option (where import-option can be any of the options listed above).
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\import-option by adding the following DWORD value:
    • DWORD value—ImportEnabled
      Modify the DWORD value as follows:
      • To turn on the import option—Value data=1
      • To turn off the import option—Value data=0
Limit mailbox size

You can limit the size of a user's mailbox to a specific number of megabytes. The value also includes the size of delegated mailboxes that can be accessed. When you implement this registry key, the mailbox size limit options aren't available. You must set the DWORD value to decimal before specifying the number of megabytes.

  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\EmailSync
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\EmailSync by adding the following DWORD value:
    • DWORD value name—MaxStorePstSizeMegaBytes
    • DWORD value data—Enter the number of megabytes that you want as the maximum size of the mailbox.
Set paths to PST and log files

By modifying the following registry key with the following string values, you can specify the locations of local PST files and log files. The new locations apply to:

  • PSTs 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, modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync by adding the following string values:
  2. For PST folders:
    • String Value name—PstFolder
    • String Value data—The path to the PST file on the local computer: for example, C:\Program Files\Google\Google Apps Sync\PST
  3. For log folders:
    • String Value name—LogFolder
    • String Value data—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 the 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 following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Tracing
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync\Tracing by adding the following DWORD value:
    • DWORD value—Level
    • Modify the default DWORD value of 7 as follows:
      • To enable information level logging—Value data=f
      • To enable verbose level logging—Value data=ff
      • To enable performance level logging—Value data=4f

Logging levels for GSMMO

If you need to enable the different logging levels for G Suite Migration for Microsoft Outlook (GSMMO):

  1. Add the following registry key—HKEY_CURRENT_USER\Software\Google\Google Apps Migration\Tracing
  2. Modify HKEY_CURRENT_USER\Software\Google\Google Apps Migration\Tracing by adding the following DWORD value:
    • DWORD value—Level
    • Modify the default DWORD value of 7 as follows:
      • To enable information level logging—Value data=f
      • To enable verbose level logging—Value data=ff
      • To enable performance level logging—Value data=4f

Learn more about GSMMO

Enable support for incoming messages with UTF-8 headers

By default, support for UTF-8 headers for incoming messages isn't enabled. You might want to enable support if you receive messages where the sender, recipient, or subject appear garbled.

Using Outlook 2016

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

Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync by adding the following DWORD values.

Step 1. Enable the CCSF_GLOBAL_MESSAGE flag when syncing incoming messages to Outlook:

  • DWORD value: UseGlobalMessageFlag
    Modify the DWORD value as follows:
    • To enable the CCSF_GLOBAL_MESSAGE flag—Value data=1
    • To disable the flag—Value data=0 (default)

Step 2: Make GSSMO set the message's MIME charset to UTF-8, when it's not specified in the message:

  • DWORD value: SetMIMECharsetToUTF8
    Modify the DWORD value as follows:
    • To set the MIME charset to UTF-8—Value data=1
    • To disable the setting—Value data=0 (default)

Using Outlook 2013 or earlier

These versions of Outlook don't natively support RFC 6530. Instead, you can enable GSSMO to make messages compatible with RFC 2047 by re-encoding some UTF-8 headers with encoded words. 

Modify HKEY_CURRENT_USER\Software\Google\Google Apps Sync by adding the following DWORD value.

  • DWORD value: FixUTF8HeadersEnabled
    Modify the DWORD value as follows:
    • To enable re-encoding of UTF-8 headers—Value data=1
    • To disable the setting—Value data=0 (default)
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