Based on your survey responses, we recommend you set up Office 365 mail services with an Exchange cutover migration, A cutover ...

Based on your survey responses, we recommend you set up Office 365 mail services with an Exchange cutover migration, A cutover migration is recommended when you want to move your Exchange users to Office 365 and manage them in the Office 365 admin center. Even though a cutover migration supports moving up to 2,000 mailboxes, due to length of time it takes to create and migrate 2000 users, it is more reasonable to migrate 150 users or less. Learn more about what you need to know about a cutover email migration to Office 365.