GSMME FAQ

G Suite Migration for Microsoft Exchange

Technical considerations  |  Set up  |  Configuration  |  Migration  |  Post-migration  |  Passwords  |  Email  |  Calendar  |  Contacts  |  Interoperability  |  Folders and labels

Technical considerations

Can I run multiple instances of GSMME on a single client machine?

No. There's a single location for configuration files. If you run multiple instances of G Suite Migration for Microsoft Exchange (GSMME) on a single client, those instances overwrite each other's configuration files. If you want to increase the number of users migrated by a client machine, increase the number of users processed. For details, go to the GSMME Admin Guide.

Can I run multiple instances of GSMME on separate virtual machines on a single client machine?

You can, but it isn't recommended. If the client machine can run multiple virtual machines, we recommend you take advantage of the machine. Run one instance of the client and increase the number of users that are processed simultaneously.

Can multiple instances of GSMME reference the same list of users?

No. Each instance has to reference a unique list of users. If you reference the same list of users, the users' data becomes corrupt.

What protocol does GSMME use to communicate with Exchange Server? Does it use Exchange Web Services?

GSMME uses MAPI. For details, go to How a GSMME migration works.

Do I have to open a specific port in my firewall?

No. You only need to open HTTPS and ensure Google IP addresses aren't blocked.

Can GSMME work with a proxy?

GSMME follows the proxy configuration defined in Microsoft Internet Explorer and uses those settings for all network connections to Google. GSMME doesn't support authenticated proxies.

Although GSMME supports proxy connections, you might need to turn on a direct connection to make sure the proxy server doesn't cause issues. Since the proxy configuration depends on your local setup, Google Cloud Support cannot assist you with this configuration. Contact your network administrator if you encounter proxy issues.

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Set up

Before I use GSMME, do I need to create user accounts in Google Workspace?

Yes. Create all user accounts in 10013416 before running a migration. For details, go to Migrate data from Exchange or Migrate mail from Google Accounts or IMAP.

Do my MX records need to point to Google Workspace before I run GSMME?

No. You don't need to change your MX records.

When I create the CSV file of users to migrate, do I supply passwords for each user?

No. Only include usernames. For details, go to Create a control CSV file for user accounts.

Does the CSV file of users to migrate need any special formatting? Do I have to build the CSV file manually?

If the file meets the format requirements, you can use an automated CSV file. For details, go to Create a control CSV file for user accounts.

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Configuration

Do I have to do anything in Google Workspace before I run GSMME?

Yes. For details, go to Authorize GSMME for your account.

Can I estimate the number of messages without doing a migration?

Yes.

In the GSMME product, on the Review G Suite Migration for Microsoft Exchange Settings dialog, you can check the Estimate box. GSMME then scans the data of all users on the source environment to determine the number of items to migrate.

The Estimate box can also be selected along with other boxes:

  • If you check both the Estimate and Migrate all data boxes, GSMME determines either the number of remaining items to migrate or items that were recently added (after a previous migration).
  • If you check both the Estimate and Migrate boxes, GSMME determines the number of items to migrate and then it automatically begins the migration after the estimation.

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Migration

Are my users affected when I run a migration?

A migration doesn't affect your users, other than now having their email, calendar, or contact data available in Google Workspace rather than your legacy server.

Can I schedule when the migration runs?

Yes. Use the command-line version of GSMME and run it as a Windows scheduled task. For details, go to Run GSMME from the command line.

Can I continue to use Exchange during a migration?

Yes.

Can I use GSMME to migrate local PST files?

Yes. You can run PST file migrations using the GSMME interface or the command line. For details, go to Migrate data from PST files.

Can I use GSMME to migrate from an IMAP-compatible server? Can I use GSMME to migrate from public folders in Exchange?

Yes. For details, go to Migrate public folders.

Can I use GSMME along with G Suite Migration for Microsoft Outlook to migrate data?

Yes. GSMME is designed to migrate data for multiple users from an Exchange or IMAP-compatible server to Google Workspace. It's implemented from the server side. G Suite Migration for Microsoft Outlook (GSMMO) migrates data for only a single user and is implemented from the client side.

Note: If you migrate data from both the server side and the client side, users could end up with duplicate data.

Can I migrate from multiple sources to one user account at a time?

No. GSMME is designed to allow only one migration at a time to a specific user.

We don't recommend having multiple concurrent API requests migrating data into single account.

Is running a test migration recommended?

Yes. For details, go to the "Test" section in the Deploy chapter of the GSMME Admin Guide.

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Post-migration

Can I continue to use Outlook as a client for Gmail after I migrate from Exchange?

Yes. You can use G Suite Sync for Microsoft Outlook (GSSMO) for this purpose. Learn more

Can my users get information about using G Suite Sync for Microsoft Outlook?

Yes. For details, go to the GSSMO in the Learning Center.

After a migration, can I stop using my Exchange Server?

Yes. After you migrate your data and set up your mail flow to Google Workspace, you can stop using your Exchange Server.

Can I use GSMME to continually sync data between Exchange and Google Workspace?

No. GSMME is designed to migrate data from Exchange to Google Workspace. It isn't designed for synchronization. Learn more

If my users want to use Outlook after migration, do they need to make any configuration changes?

Yes. When they open the GSSMO product, they’ll create a profile that points their Outlook account to Gmail. No other configuration is necessary.

After migration, can I use Mozilla Thunderbird to display Google Workspace data? After migration, can I use the Microsoft Entourage email and calendar client?

Yes, but it isn't a supported client. For details, go to Check Gmail through other email platforms.

Do I have to move my MX records to Google, or can I use a third-party gateway?

No. You can use a third-party gateway for email delivery.

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Passwords

Does GSMME synchronize Active Directory passwords to Google Workspace?

No. If you're using Microsoft Active Directory, you can use G Suite Password Sync (GSPS) to sync user passwords from Active Directory to your Google domain.

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Email

Do users get details about the messages that didn't migrate?

No, but administrators can. For details, go to the "Viewing migration reports" section in the Troubleshoot chapter of the GSMME Admin Guide.

If we have years of email in an on-site archive, can it be migrated to Google Workspace?

Yes. The archived messages must be moved to Exchange first and then migrated.

Are messages in subfolders migrated?

Yes. In Gmail, the corresponding labels are separated by a slash character to indicate the folder hierarchy. For example, Receipts/2019 Q1.

If I move a message from one Exchange folder to another, and then run a migration, does the message get migrated again?

If you choose the Migrate all data option, the message is migrated again. It's displayed in Gmail with a new label that corresponds to the new Exchange folder.

Are multiple flags on an Exchange message mapped to multiple stars in Gmail?

No. Any flags on an Exchange message are mapped as a single star in Gmail.

Are Outlook filters and rules migrated to Gmail?

No, but your users can create rules in Gmail. For details, go to Create rules to filter your emails.

Is there a limit on the size of a message that can be migrated?

Yes. The limit for a message, including any attachments, is 25 MB.

Is there a way to automatically have the From address in Gmail be different from the username specified in the CSV file?

No.

If I want to use Gmail instead of Outlook, should I use a different migration option? What if I'd like to keep using Outlook?

If you want to let individual users take control of their migrations, G Suite Migration for Microsoft Outlook (GSMMO) lets users migrate email, calendar, or contact data from an Exchange account or local PST file into a Google Workspace account.

If your organization has switched to Google Workspace but you'd like to keep using Outlook, G Suite Sync for Microsoft Outlook (GSSMO) lets users synchronize mail, calendar events, contacts, notes, and tasks between Outlook and a Google Workspace account.

For more migration options, go to the Google Workspace migration product matrix.

Should users who use Outlook after a migration turn off read receipts?

Yes. Outlook can automatically send read receipts for the synchronized messages, which result in unnecessary non-delivery reports. Turning off read receipts in Outlook prevents them from being sent automatically.

Is email cached locally for users who choose to use Outlook?

Yes. Users can continue to work in Outlook when an internet connection is unavailable. Data is synced between Outlook and Google Workspace when the internet connection is restored.

Can I archive messages with Google Workspace?

Yes. You can use Google Vault, which includes email archiving.

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Calendar

When a calendar event is migrated, is all the attendee information migrated? If so, does it migrate to the correct Google Workspace account?

Yes.

If a calendar event has multiple attendees and I update the meeting after a migration, are all attendees notified?

Yes.

Are calendars in public folders migrated?

No.

Are group calendars and resource calendars migrated?

No. You need to recreate them in Google Workspace.

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Contacts

Is my Global Address List migrated?

No. However, you can use Google Cloud Directory Sync (GCDS). If you’re using GSSMO, go to Manage your Global Address List.

How is my Global Address List made available to users after migration?

The addresses should appear in Gmail when a contact name or email is entered in the To, Cc, or Bcc fields.

Are mailing lists migrated?

No. You can use GCDS to migrate mailing list memberships (not archives) to Google Groups. Learn more

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Interoperability

Does GSMME migrate data from Exchange Online (Office 365)? Can I sync data between Google Workspace and my on-premises Exchange Server?

No, but you can set up delivery so messages are sent to Google Workspace and Exchange.

Is there a Google Workspace equivalent to mail-enabled public folders?

Yes. You can implement similar functionality by using Google Groups to create a collaborative inbox, or by using shared files and folders in Google Drive. You can also create calendars to share with a group.

Can I use Exchange and Google Workspace over the long term?

Maybe. You can route incoming messages to Gmail or another external server based on user settings. Then, you can use Calendar Interop to share free and busy information between Exchange and Google Workspace. Consult with your deployment specialist to find out if this is the best approach for your organization.

Can I migrate just the last 2 weeks of my users' email and move anything older to a Google Workspace archive?

Yes.

Archiving data

GSMME allows you to add users’ migrated email messages to Google Vault, instead of storing them in their Gmail mailbox, using the Migrate to Google Vault feature. You can migrate email to Vault from PST files or any supported mail server, including Exchange, IMAP, and Gmail. Note that migrated messages are not visible in users’ Gmail inboxes.

For details, go to the "Add migrated email to Google Vault" section in the Migrate data chapter of the GSMME Admin Guide.

Setting a date range

If you want to migrate only a portion of email messages, you can specify a date range. For example, you can migrate all mail messages except for the past 2 weeks into Google Vault using the Migrate to Google Vault feature along with a date range.

For details, go to the "Select the data to migrate" section in the Migrate data chapter of the GSMME Admin Guide.

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Folders and labels

Is folder-to-label conversion limited to 40 characters?

No. We have successfully tested conversions with up to 226 characters.

Are empty folders mapped to Gmail labels?

No. Empty folders aren't migrated. And, the corresponding labels aren't created.

Are email messages in subfolders migrated?

Yes. The corresponding labels in Gmail indicate the folder hierarchy by inserting slash characters in the label names. For example, Receipts/2019 Q1.

If I move a message from one Exchange folder to another, and then run a migration, does the message get migrated again?

If you choose the Migrate all data option, the message is migrated again. It's displayed in Gmail with a new label that corresponds to the new Exchange folder.

Why is there a difference between the total number of messages following a migration?

Following a migration, you might notice that the number of email messages in the source environment exceeds the number of messages migrated to Gmail.

This discrepancy might be due to the difference between folders in Exchange and IMAP mail servers, and labels in Gmail. In Exchange and on IMAP mail servers, when you assign a message to more than one folder, the message is duplicated. Following a migration, the duplications are removed in Gmail and different labels are applied instead.

To verify all messages have been migrated, check the logs for errors. For details, go to the Migration reports chapter of the GSMME Admin Guide.

If you think you’re missing some messages, check whether:

  • The message, including attachments, is not bigger than 25 MB. You can’t migrate messages bigger than 25 MB. For details, go to Send attachments with your Gmail message.
  • Gmail is not blocking an attachment to the message. Gmail blocks certain types of attachments, such as executable files. For details, go to File types blocked in Gmail.
  • The message is in a folder or within a date range that’s part of the migration.

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Related topics


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