Checkout this amazon workmail to office 365 converter software which can migrates single as well as multiple mailboxes from Amazon WorkMail to Exchange Server or Office 365 without much effort. The migration is performed within 4-5 steps without any data loss and technical complexities. this migration tool offers WorkMail migration to all types of Exchange deployments – on-premises, hosted, and cloud. Also, it supports all Office 365 (Exchange Online) plans and Exchange Server versions for the migration. this Amazon WorkMail to Office 365 allows its user to migrate only the required data to the destination. It has integrated some interesting filters like Date range (for a particular period), item type (emails, contacts, tasks, etc.) within it. Exclusion options for Deleted folder and empty folders are also offered. Simply, you have control over the data to be migrated.