If you want to move your Amazon WorkMail mailboxes to Office 365 without losing any data, the Shoviv Amazon WorkMail to Office 365 Migration Tool is your best bet. This tool guarantees that your data remains intact and keeps your original folder structure during the entire migration. Shoviv can handle the migration of emails, contacts, and calendars from both single and multiple mailboxes, with no restrictions on size or quantity. 

It comes packed with advanced features like incremental migration to prevent duplicates, flexible mailbox mapping options (whether you prefer automatic, manual, or CSV-based), and the ability to filter by folder or date for a more selective transfer. Plus, its user-friendly interface makes it accessible for everyone, and you can count on 24/7 technical support if you need any help. There's even a free demo available, allowing you to test the migration by transferring the first 50 items from each folder!

Read more about AWS WorkMail to Office 365 Migration.