Mailbox Migration Tool
https://learn.microsoft.com/en-us/exchange/mailbox-migration/perform-g-suite-migration
Bit Titan Tool
| Bit Titan | Microsoft Mailbox Migration Tool | |
| Cost | Paid For | Free |
| Labels | Migrate to Folders of Categories | Does not Migrate |
| Chats | Supported | Not Supported |
| Outlook Rules | Rules will be migrated and remain turned off by default. We advise users to verify the rules on Outlook before enabling them. | |
| Vacation settings, Automatic reply settings | ||
| Meetings Rooms | Room bookings will not be migrated | |
| Suggested Contacts | Supported | Not Supported |
| Contacts | Only first 3 are stored. Rest are stored in overflow properties. | A maximum of three email addresses per contact are migrated over Gmail tags, contact URLs, and custom tags will not be migrated |
| Calendar | Appointments\Calendar Reminders \Chat message attachments | Shared calendars and event colors will not be migrated |
