Google (Free) to Office 365 Migration

In Google:

https://myaccount.google.com/security

Enable 2-Step Verification

https://myaccount.google.com/apppasswords

Get an app password

In Office 365:

Active users - Microsoft 365 admin center 

Make and license the user with a mailbox

Migration Batch - Exchange admin center 

Make a new migration batch

Migrate to Exchange Online

IMAP Migration

Create a new endpoint

• Server: imap.gmail.com
• Port: 993
• Security: SSL

Make and import a CSV with 3 fields:

EmailAddress,UserName,Password

365user@365domain.com,gmailuser@gmail.com,apppassword