The domain controllers can run any version as long as the schema version and forest-level requirements are met. The Active Directory schema version and forest functional level must be Windows Server 2003 or later. You have Exchange 2010 and want to migrate mailboxes in small batches over time.įor more information, see Use the Microsoft 365 and Office 365 mail migration advisor.įor Azure AD Connect you can use your 2016 domain controller to sync the users to azure AD, you don't need to upgrade to windows 2022. You have Exchange 2010 and more than 150-2,000 mailboxes. Use this type of migration to maintain both on-premises and online mailboxes for your organization and to gradually migrate users and email to Microsoft 365 or Office 365. Migrate using an integrated Exchange Server and Microsoft 365 or Office 365 environment (hybrid) To perform the migration tasks, see Perform a staged migration of Exchange Server 2003 and Exchange 2007 to Microsoft 365 or Office 365.

For an overview of staged migration, see What you need to know about a staged email migration to Microsoft 365 or Office 365. Use this type of migration if you're running Exchange 2003 or Exchange 2007, and if there are more than 2000 mailboxes. Migrate mailboxes in batches (staged migration) With cutover migration, you can move up to 2000 mailboxes, but due to length of time it takes to create and migrate 2000 users, it's more reasonable to migrate 150 users or less.

For information on how to use the Express migration, see Use express migration to migrate Exchange mailboxes to Microsoft 365 or Office 365. You can perform a cutover migration by starting from the EAC for more information, see Perform a cutover migration to Microsoft 365 or Office 365. Use this type of migration if you're running Exchange 2003, Exchange 2007, Exchange 2010, or Exchange 2013, and if there are fewer than 2000 mailboxes. Migrate all mailboxes at once (cutover migration) or Express migration There are three types of email migrations that can be made from an Exchange Server: Welcome to Microsoft Q&A community forum!įor migrations from an existing on-premises Exchange Server environment, an administrator can migrate all email, calendar, and contacts from user mailboxes to Microsoft 365 or Office 365.

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