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How to migrate from G suite to Office 365?

Following are the steps to Switch from G suite to Office 365

1. Verify the domains you own

If you can successfully log-in to your domain registrar account, you can create the DNS record for your domain. This is enough for Office 365 that you own the domain name. Verification of your domain name is the first step for G Suite to Office 365 migration.

2. Adding users to Office 365

Adding users to Office 365 requires licenses for every single user. To migrate Gmail to Office 365, every user must have an Office 365 mailbox before migrating emails.

3. Collate the list of email IDs on Microsoft Excel

While creating migration files, you need to have passwords for every Gmail ID that is being migrated. It is almost impossible to know every password, so you can reset them, and assign temporary passwords during the for every Gmail mailbox. You can create batches as per your requirements to migrate all the Gmail mailboxes, saving you the hassle of migrating everything at once. About 50K mailboxes up to 10 MB can be migrated in one batch where every user will be assigned one row. When you log in to G Suite admin user console, choose the ?Users? option.

Choose every user?s name and write down their email address corresponding to it.

Now login to Microsoft Admin Center. Go the ?Users? option. Then click ?Active users.?

Along with it, keep in mind the username column and Microsoft 365 admin center window.

Launch Microsoft Excel.

Type Address in cell A1, username in cell B2, password in cell C1. See the following image:

G Suite to Office 365 migration process

A1 = Email Address required for Office 365 domain

B2 = Email Address (previous) on G Suite

C3= Temporary password during the migration

Explained with example:

Gmail to Office 365 migration

One mailbox per row can be entered in the format as shown above. Other email addresses, usernames, and passwords can be put in cells below. Both email addresses can be similar as well, but the environment (From G Suite/ Google Apps to Office 365) is changed.

G Suite to O365 Migration

Once you have entered all the email IDs, as shown above, save the file in the CSV format.

4. Creation of Migration Points

Email migrations technically happen through migration endpoint, which is the focal point for communication between two email systems that are involved in migration. Thus, you need to create a migration endpoint to connect Office 365 to Gmail. Here?s how you create migration endpoint(s) when you have to migrate Google Apps to Office 365.

?In the Exchange Admin Center, follow this path:

Recipients ? Migration ? More…

Then select Migration endpoints.

? Click on the ?New +? option.

? Choose the IMAP option (as G Suite is IMAP-based), and on the IMAP migration page, keep the default settings as it is. The server should be set to imap.gmail.com.

? Click Next and follow the necessary instructions. Then, click ?New? for creation of new migration endpoint.

The next step is to create batches of mailboxes. This helps you to segregate the mailbox as per your priority. It is also useful for testing your migration before performing bulk migration.

5. Migrating mailboxes in batches

As a standard practice, you can start migrations by creating batches with a small number of emails for testing purposes. You can start many migration batches at the same time, and compare the time taken by each batch for migration. This will help you determine the total time required for the entire mailbox migration. The factors which impact migrations are the batch size, speed, internet bandwidth, number of simultaneous connections to the source email system.

In the Admins centers, select Exchange.

Follow the steps: Recipients

? Migration New +

? Migrate to Exchange Online

IMAP migration ? Next ? Move configuration. Here you?ll be able to sort the name of the migration batch. as an example, Batch1. you?ll be able to produce the same batch and name it, say, Batch 2.

The default batch name shown is the migration being carried out at that time. If you don?t want any folders to be migrated with that batch, you can use the settings to exclude those specific folders.

? After clicking Next, on the Start the Batch page ? Select Browse if you want to send a copy of migration report to some users. Select new after automatically starting the batch.

? Once you see Syncing status, the migration has started.

Once the batch is in process, you can see the status of mailboxes migrated. You can do a simple verification by checking the batch name on the Exchange admin center dashboard. Login to Office 365 page. Type your username and temporary password. Do a mail flow test to check if incoming and outgoing emails are working properly.

6. Pointing MX record to Office 365

The DNS records need to verify that your domain has been changed from Google to Office 365. Earlier, all your emails were delivered to Gmail as the MX record was pointed to G Suite. MX record helps the incoming emails to land in one particular inbox. There are many instructions to change MX record for different DNS systems. Before you stop synchronization with Gmail, you need to wait a minimum 72 hours as it takes that much for other email systems to recognize the MX record change.

After 72 hours, you can stop synchronization with Gmail.

7. Disabling Gmail sync with Office 365

This is the final task in your Gmail to Office 365 migration. Once your MX record has been pointed to Office 365 for at least 72 hours, you can stop disable synchronization between Office 365 and G Suite. Verify all emails are being routed to Office 365 before delete the migration batch and stop syncing. You can delete the migration batch in Exchange Admin Centers. You need to check that the migration batch is not displayed on the migration dashboard, which means that migration has worked.

Once migration is completed, you can independently import your Google Contacts and Calendar to Office 365. 

I hope this method will be helpful!

Mark Wilson

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